Obituary of Roy Porter.

Roy Porter, Britain's best-loved historian, is remembered by his friends Bill Bynum and Sarah Dunant. He was a brilliant teacher, a sage who could talk on anything, but his passion was 18th century rationalism. He dressed unconventionally, open shirts, chest hair, gold chains - and he rode a bike. His first wife said he looked like a frog! Completely generous, with no sense of ego, he was a passionate communicator.