This seems likely to be a cottage in Guernsey - it has a fine granite chimney, and if you look closely there is also some traditional corrugated iron roofing on the right hand edge of the picture...  It was certainly sent from the island, on 30 August 1911, by a Mr Wildham, staying at Gardner's Royal Hotel, to the Rev. Musgrave, who was the Roman Catholic Chaplain at Wormwood Scrubs. Mr Wildham says, among other things, that "We visited the Agricultural College, but have quite concluded not to send J. there."  Which establishment was he talking about?

28/6/05 Many thanks to John for pointing out straight away that it must have been the Vauxbelets. I wonder what was wrong with it?

May 2007: my thanks to Darryl Ogier for pointing out a while ago that this is in Sark. It's La Ville Roussel de Bas, illustrated in Ewen and de Carteret's book 'The Fief of Sark' (1969, opposite p. 110).