"Account of a death from chloroform in Bristol"
(13 March 1858): 207-08
British Medical Journal
PDF courtesy of PubMed Central, NIH's free online digital database.
A paper read at the 25 February 1858 meeting of the Bath and Bristol branch of the British Medical Association. Discussion followed the paper, and is included in this PDF version of the minutes published in BMJ.
Snow's reply was published in the following number.