Sherlock Holmes — Consulting Investigator of London

Sherlock Holmes solves crimes by noticing what everyone else has already seen. Mud on a boot, wax beneath a fingernail, ash from the wrong fuel, a copied hand that hesitates at one letter—Holmes treats each as part of the same argument.
In London he works outside ordinary civic office, taking cases from merchants, nobles, household officers and occasionally the authorities when the obvious explanation does not survive examination. He is most useful to adventurers when he reveals the shape of a mystery without removing the need to act on it.
At a Glance
- Name: Sherlock Holmes
- Species: Human
- Age: Mid-thirties
- Base: London
- Role: Consulting investigator, forensic observer and analyst
- Alignment: Neutral Good
- Campaign status: Alive and active
- Campaign use: Investigator, patron, rival solver, source of deductions or target of a criminal network
Game Statistics
5.5e / 2024
Sherlock Holmes
Medium Humanoid (Human), Neutral Good
Armor Class 16
Hit Points 88 (16d8 + 16)
Speed 30 ft.
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 11 (+0) | 17 (+3) | 13 (+1) | 20 (+5) | 18 (+4) | 14 (+2) |
Saving Throws Int +8, Wis +7
Skills Insight +10, Investigation +11, Perception +10, Sleight of Hand +6, Stealth +6
Senses passive Perception 20
Languages English, French, thieves’ cant
Challenge 8 (3,900 XP; PB +3)
Traits
Deductive Focus. After examining a scene, object or body for 1 minute, Holmes has Advantage on Investigation checks concerning it and may ask the GM for one materially relevant inconsistency visible from the available evidence.
Observe the Habit. After watching a creature for 1 round, Holmes has Advantage on Insight checks against it until the end of the encounter.
Evasion. Holmes takes no damage on a successful Dexterity save against an effect that normally deals half damage, and half damage on a failure.
Actions
Rapier. Melee Attack Roll: +6, reach 5 ft. Hit: 7 (1d8 + 3) Piercing damage.
Walking Stick. Melee Attack Roll: +6, reach 5 ft. Hit: 6 (1d6 + 3) Bludgeoning damage.
Expose the Pattern (Recharge 5–6). Holmes chooses one creature he has observed. Until the start of Holmes’s next turn, attacks against that creature by Holmes and one ally of his choice have Advantage.
Reactions
Anticipate Move. Holmes imposes Disadvantage on one attack made by a creature he has observed for at least one round.
Sherlock Holmes — 5e / 2014
Medium humanoid (human), neutral good
Armor Class 16; Hit Points 88 (16d8 + 16); Speed 30 ft.; Challenge 2 (450 XP; proficiency bonus +2). This is his personal combat challenge, not a measure of his investigative ability.
STR 11 (+0), DEX 17 (+3), CON 13 (+1), INT 20 (+5), WIS 18 (+4), CHA 14 (+2).
Saving Throws Int +7, Wis +6; Skills Insight +8 (expertise), Investigation +9 (expertise), Perception +8 (expertise), Sleight of Hand +5, Stealth +5; Senses passive Perception 18; Languages English, French, thieves’ cant.
Traits
Deductive Focus. After examining physical evidence for one minute, Holmes has advantage on Intelligence (Investigation) checks concerning it. The GM provides one observable inconsistency on a success, not a complete solution.
Observe the Habit. After watching a creature for one round, Holmes has advantage on Wisdom (Insight) checks against that creature until the encounter ends.
Evasion. If a Dexterity saving throw normally allows half damage, Holmes takes no damage on a success and half on a failure.
Actions
Rapier. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) piercing damage.
Walking Stick. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage.
Expose the Pattern (Recharge 5–6). Holmes chooses a creature he has observed within 30 feet. Holmes and one willing ally of his choice have advantage on their first attacks against it before the start of his next turn.
Reaction
Anticipate Move. Holmes imposes disadvantage on one attack roll against him by a creature he has observed for at least one round and can see.
Original 5e/2014 campaign conversion. Intelligence checks reveal plausible evidence; neither expertise nor challenge rating guarantees knowledge of facts the GM has not established.
Pathfinder 1e
Sherlock Holmes CR 8; human investigator 9; NG Medium humanoid.
AC 20; hp 70; Fort +5, Ref +9, Will +10. Studied combat, studied strike, inspiration.
Str 11, Dex 17, Con 13, Int 20, Wis 18, Cha 14. Skills Disable Device +16, Knowledge (local) +18, Linguistics +17, Perception +20, Sense Motive +20, Sleight of Hand +15, Stealth +15.
D&D 3.5e
Sherlock Holmes CR 8; human expert 5/rogue 4; NG Medium humanoid.
AC 19; hp 61; sneak attack +2d6. Feats Alertness, Investigator, Skill Focus (Search), Skill Focus (Sense Motive). Skills Gather Information +15, Listen +16, Search +20, Sense Motive +20, Spot +18.
What Is Sherlock Holmes Doing Right Now?
Holmes is investigating the forged-warrant network spreading through London. He has concluded that the stolen seals are not the central crime. Someone is testing how quickly false authority moves through households, gates and city officers.
The detail troubling him is mathematical: several apparently unrelated thefts occurred at intervals too regular to be accidental. Holmes suspects the pattern belongs to James Moriarty, a learned mathematician whose name rarely appears near any crime.
Meeting Sherlock Holmes
Holmes looks at boots before faces and hands before heraldry. He may correctly identify where an adventurer slept, what road they travelled and whether they recently handled lamp oil before remembering to introduce himself.
He is impatient with vague testimony but values witnesses who admit uncertainty.
Encounters
- A locked chamber contains no hidden passage, but the dust proves someone entered after the door was sealed.
- Holmes asks the party to reproduce a suspect’s route while he watches what evidence they disturb.
- A noble hires Holmes to prove a servant guilty; Holmes quickly suspects the noble instead.
- Moriarty deliberately leaves a clue only Holmes is likely to recognise.
Appearance and Manner
Holmes is lean, sharp-featured and restless, usually dressed more plainly than his clients expect. His fingers are frequently stained by charcoal, wax, herbs or alchemical reagents. When thinking he becomes unnervingly still; when a pattern finally resolves he moves and speaks much faster.
Personality
Intense, competitive and impatient with sloppy reasoning, Holmes can appear arrogant because he often reaches conclusions before explaining the path. He is capable of deep loyalty but treats displays of emotion as evidence he would rather analyse than discuss.
Relationships
John Watson: closest companion, medical expert and moral counterweight.
Frederick Abberline: official investigator whose access to witnesses and custody records Holmes respects.
James Moriarty: adversary capable of understanding systems rather than merely committing crimes.
Equipment and Resources
- Magnifying lenses and polished inspection glass
- Notebook, chalk, measuring cord and compass
- Small alchemical reagent case
- Disguise clothing and pigments
- Rapier, dagger and sturdy walking stick
- Files of handwriting, seals, ash, cloth fibres and known criminal methods
Running Holmes at the Table
Use Holmes to sharpen a mystery, not end it. He should identify an inconsistency, reconstruct a physical action or rule out an attractive false theory, then require adventurers to obtain the missing testimony, reach the dangerous location or confront the person behind the evidence. His deductions are most satisfying when they create a new decision rather than replace one.
Adventure Hooks
- The Regular Crime: Holmes asks the party to investigate why three thefts occurred at mathematically precise intervals.
- The Wrong Footprint: a murder scene contains the victim’s own muddy footprint in a place they could not have reached alive.
- Watson’s Patient: an injured witness tells Watson something they refuse to repeat to Holmes.
- The Moriarty Proof: Holmes believes a series of petty crimes forms one larger operation but needs adventurers to follow the money.
- The Disappearing Ash: a unique fuel ash links several noble houses that publicly have no connection.
Connected Places and People
Mythical and Historical Context
Sherlock Holmes first appeared in Arthur Conan Doyle’s A Study in Scarlet (1887); he is not a documented investigator living in 1454. This version deliberately transfers the fictional detective’s methods to London under Henry VI, replacing Victorian technology and policing with court rolls, witnesses, craft evidence and household investigations. His encounters and game statistics are new campaign adaptations. Read Doyle’s original Adventures of Sherlock Holmes and the Encyclopaedia Britannica account of the character.
Literary Inspiration
Sherlock Holmes originates in the stories of Arthur Conan Doyle. This campaign version keeps his observation, deduction, disguises and rivalry with Moriarty while translating his methods into fifteenth-century London.
Rules Notes
The game statistics and campaign relationships are original adaptations for the stated rules editions.
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