The ridiculous idea that Gissing might have been Jack the Ripper, or had some connection with the Whitechapel murders, seems to have taken on a life of its own; I have heard it mentioned by students who know almost nothing else about Gissing's life. The rumour has appeared in more than one paperback 'encyclopedia' about the murderer. Furthermore, there is surely some echo of the suggestion in Peter Ackroyd's recent novel Dan Leno and the Limehouse Golem, although the dates are changed in the novel and the Gissing  character isn't 'guilty'.

Ludicrous though the idea is, it does have a certain historical interest. The story must have come from somewhere, and it does raise the possibility that Gissing was perhaps questioned by police after he returned from Italy. If this really happened, it may of course only have been because the authorities knew about his professional interest in low life London, especially as this was presumably around the time of the publication of The Nether World. As far as I am aware, the first time the rumour of Gissing's involvement appeared in print was in Richard Whittington-Egan's A Casebook on Jack the Ripper  -- who is the authority cited by all other authors.

There is sort of mad coincidence in the Ripper assertion, though. Nell dies in misery in Lambeth in February of '88, and  gives rise to the famous agonised Diary entry. Gissing writes The Nether World between then and July. As Halperin says, he  was in a state of 'savage moodiness and misanthropy' and probably at this time was using the services of prostitutes.  Unfortunately for the theory, he went off to Italy on 16 September and was there during the Ripper murders in  October-November. There is a passing allusion to them in the Letters.

The Ripper is usually assumed to have been consumed by a psychopathic resentment towards women, especially prostitutes. There is no hint of that in Gissing's biography. Though he is often savagely satirical about women -- especially lower middle class, vulgar women -- he is I think invariably pitying towards 'unfortunates' - though it goes along  with a certain erotic fascination with them.

POSTSCRIPT: Inquiries in December 2000 on the "Casebook" website devoted to the Ripper produced the further information that Mr Whittington-Egan believes that he read about the Gissing allegation some 40 years ago, but cannot recall the source now.
 

  URL : http://www.flinders.edu.au/topics/Morton/Gissing/Gissing&Jack.html