Holmes stresses on method, style, verifications, physical peculiarities, civic identity, personal anagraphical data, which eventually gave rise to anthropometry and dactyloscopy and remains perhaps the greatest fictional detective till date, who fulfills all the professional requirements of one, and other lesser detectives are compared with him to their disadvantage.
There are many differences and similarities in Holmes of Speckled Band and Marlowe of The Deep Sleep. Characteristics, ways of solving crimes, diverse approaches show the gulf between them more than the similarities. Holmes' professionalism is rooted on astute Observations and logical reasoning. Conon Doyle, being a medical man, with extensive travel knowledge and science background, created the unerring master brain.
Holmes is assisted ably by Dr. Watson, who is a confidant; friend, trustworthy colleague and Marlowe lacked this assistant who brings great insight and freshness to Holmes's novels. This also created a human touch, a specific relationship side of an otherwise dry, awfully focused, brittle nature of the master detective, whose remark 'Elementary, my dear Watson' created the signature line of detective world (did not appear in the books). A man of unlimited skills to perfection, he could collect evidence by observation of seemingly unimportant things like footsteps, ashtrays, clothing and gait. Marlowe lacks an assistant and is not blessed with subtle insights.
Holmes is a 'consultant detective expert who is brought into cases that have proven too difficult for other investigators." He also calls himself "a competent cryptanalyst.the author of a trifling monograph upon the subject". In method Holmes differs from the rest. "Holmes is a detective who is strong in deduction, and he supports this by close research, keen observation and keeping precise records," http://epubl.ltu.se/1402-1773/2006/064/LTU-CUPP-06064-SE.pdf
He is a kind of 'Bohemian' according to his own admission and is not a stuffed up, stiff Victorian. He has a touch of bipolar mania, mainly due to his hyperactive brain, which hates any kind of apathy, and Watson describes him as a 'desiccated calculating machine'. In modern terms, he is a human computer with extraordinary intelligence and an acutely balance mind and hated to be inactive. He never longs for a social life or company. He is a complete person who does not need complimentary support. Holmes is a bachelor without any interest in women, with an 'aversion to women' calls them 'quicksand' and has a rather low opinion about them. He uses cocaine, despite Watson's remonstrations, his 'only vice'. He is a heavy smoker too; but smoking is not referred to as 'vice'. Holmes has no literary interest, though he talks about Shakespeare and Goethe; but he plays violin regularly. He is interested in chemistry, poison and science of all kinds. He uses his pipe for 'quiet analyses' and uses 'psychoactive substances'. Dr. Watson says Holmes could bend the truth like lying to the police, conceal evidence or even house break, when it suits him. He uses everything in his power to solve the crime, even the methods in the legal grey zone. He can think best in silence, and is able to solve the case many times without leaving the house. He maintains extensive