(I studied the results of this research for years and have only recently refound it.)
Way back in 1975, I started a PhD research project on the feral cats that lived in Portsmouth Naval Dockyard (on the south coast of England, UK).
This site provides some information about my study.
You may have seen the dockyard cats in a short section about my research in the BBC World About Us programme, "The Curious Cat", which has been repeated a number of times over the years. (That programme was mainly about the rural cat study supervised by Dr David Macdonald.)
AN APOLOGY: This website was formerly hosted using AOL's free webspace. Sadly, AOL decided to withdraw this service as from 30.10.08, and delete all files, without issuing email notification to subscribers. This meant that I was unable to set up a redirection from the old site before it disappeared, so apologies if you looked for it and had trouble finding it here.