Police have issued a photograph of a man they are keen to trace after he disappeared five days ago.
Derek Morgan, aged 57, of Westbourne Road, Broomhill, was expected back at home on Sunday after boarding a train to the city from Northumbria, where he had been staying.
But police said he never arrived home and there are now concerns for his safety.
Mr Morgan is white, of medium build, with grey collar-length swept back hair.
He usually has a moustache and beard and wears tinted spectacles.
n Anyone with information of his whereabouts should call South Yorkshire Police on 0114 220 2020 and quote incident number 676 of July 5.