Sherlock Holmes Society of London: Carrie Chandler, co-organiser with Alice Doyle (photo by Roger Johnson)
Sherlock Holmes Society of London: Carrie introduces the first speaker (photo by Roger Johnson)
Sherlock Holmes Society of London: Catherine Cooke (photo by Roger Johnson)
Sherlock Holmes Society of London: Catherine's topic is Watson's medical training (photo by Roger Johnson)
Sherlock Holmes Society of London: Catherine Cooke (photo by Roger Johnson)
Sherlock Holmes Society of London: Catherine Cooke & Carrie Chandler (photo by Roger Johnson)
Sherlock Holmes Society of London: Catherine Cooke (photo by Roger Johnson)
Sherlock Holmes Society of London: Carrie introduces the second speaker (photo by Roger Johnson)
Sherlock Holmes Society of London: Dr Alan Bates (photo by Roger Johnson)
Sherlock Holmes Society of London: Dr Bates has something in common with John H Watson (photo by Roger Johnson)
Sherlock Holmes Society of London: Like Watson, he took his MD at London University (photo by Roger Johnson)
Sherlock Holmes Society of London: And he too studied medicine at University College (photo by Roger Johnson)
Sherlock Holmes Society of London: Alan Bates (photo by Roger Johnson)
Sherlock Holmes Society of London: Alan Bates (photo by Roger Johnson)
Sherlock Holmes Society of London: Carrie introduces the third speaker (photo by Roger Johnson)
Sherlock Holmes Society of London: EJ Wagner (photo by Roger Johnson)
Sherlock Holmes Society of London: EJ is best known as a crime historian (photo by Roger Johnson)
Sherlock Holmes Society of London: She is the author of the Edgar Award-winning book 'The Science of Sherlock Holmes' (photo by Roger Johnson)
Sherlock Holmes Society of London: In 2008 she gave a talk to the Society on 'Superstition, Science and Sherlock Holmes' (photo by Roger Johnson)
Sherlock Holmes Society of London: Her topic this time was the murder of Dr George Parkman (photo by Roger Johnson)
Sherlock Holmes Society of London: Parkman was killed at Harvard Medical College in 1849 (photo by Roger Johnson)
Sherlock Holmes Society of London: John White Webster was Professor of Chemistry & Geology (photo by Roger Johnson)
Sherlock Holmes Society of London: Webster was tried, convicted and executed (photo by Roger Johnson)
Sherlock Holmes Society of London: Webster's conviction was one of the first based on scientific evidence (photo by Roger Johnson)
Sherlock Holmes Society of London: EJ Wagner (photo by Roger Johnson)
Sherlock Holmes Society of London: EJ Wagner (photo by Roger Johnson)
Sherlock Holmes Society of London: New Chairman Elaine McCafferty thanks Carrie and Alice (photo by Roger Johnson)
Sherlock Holmes Society of London: All the speakers receive a Sherlock Holmes Society pen (photo by Roger Johnson)
Sherlock Holmes Society of London: Except for Catherine, who gets a Scotland Yard pen (photo by Roger Johnson)