We have been cruising up the Hooghly from Calcutta to Farakka, upstream in time through Bengal&rsquos colonial era, past the Nawabi, to its pre-Islamic capital in Gour. Now it&rsquos time to go home. The Shatabdi Express hurtles south, past acres of paddy radiant in the early spring light. It will cover in four hours the distance we&rsquove sailed over seven days. A man sits transfixed at his window that bears a large spider crack, his book neglected. He is a former director at Sotheby&rsquos and a serious collector of old India photographs. A lush land rushes by, dotted with wiry men and women, hair-pin bent, magicians all. They fill the immense canvas by hand, pixel by green pixel, clear to the horizon. Is the crack bothering him &ldquoNot at all, it looks like an old photograph&rdquo Over the past week, he and I have seen a panoply of old photographs, of mute ruins and of vibrant immutable life, the river&rsquos gift to us. But perhaps we haven&rsquot seen the same photographs.