Thaddeus Sholto sat twitching on his luxurious settee after explaining to Holmes, Watson and Miss Morstan how her father had died and the story of the Agra Treasure. (The Sign of Four)

 

Holmes suggested the Watson 'Try the settee' while Mr Wilson outlined the story of the Red-Headed League. (The Red-Headed League)

 

Holmes rolled his left shirt cuff up in the first paragraphy of the second story - The Sign of Four. Watson witnessed this on many occasions when Holmes was out of work but Watson never got used to it.

 

From the six parallel cuts on Dr Watson's left shoe, Holmes deduced that Watson had been out in vile weather and that his new servant was somewhat poor at her duties. (A Scandal in Bohemia)

 

Used by plumber's to help trace faulty pipes. Watson used one to help Holmes get Irene Adler to show him where she kept the photograph. (A Scandal in Bohemia)

 

From seeing a sheet of stamps on Watson's desk, Holmes deduced that he had been to the Wigmore Street Post-Office to send a telegram. (The Sign of Four)

 

Thaddeus Sholto asked Dr Watson to use his stethscope to examine him, "I have grave doubts about my mitral value". (The Sign of Four) 

 

Doctor Watson hid his stethoscope in the right hand side of his top hat. (A Scandal in Bohemia)

 

Holmes took his revolver on the occasion when he and Dr Watson escorted Mary Morstan to the Lyceum Theatre. Dr Watson however took his heaviest stick. (The Sign of Four)

 

This object was found at the side of Bartholomew Sholto when his dead body was discovered. It was described as "a brown close-grained stick, with a stone head like a hammer, rudely lasked on with course twine. (The Sign of Four)