I'm not an historian but I can get interested - obsessively interested - with any aspect of the past, whether it's palaeontology or archaeology or the very recent past.

I'm not an historian and I'm not wanting to write about how I perceive the social change over the century as a historian, but as somebody who's walked through it and whose life has been dictated by it too, as all our lives are.

The Photograph is concerned with the power that the past has to interfere with the present: the time bomb in the cupboard.

I have long been interested in landscape history, and when younger and more robust I used to do much tramping of the English landscape in search of ancient field systems, drove roads, indications of prehistoric settlement.

Since then, I have just read and read - but, that said, I suppose there is a raft of writers to whom I return again and again, not so much because I want to write like them, even if I were capable of it, but simply for a sort of stylistic shot in the arm.

The power of language. Preserving the ephemeral; giving form to dreams, permanence to sparks of sunlight.