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A Police spokesman said:
We are currently looking in the Little Ribston area and we ask people in that area to check their outbuildings and land for any signs of Mr Roskell.
We remain concerned as tonight will potentially be his third night out in the currently very cold nights.
Graham Roskell, aged 65, from Kirk Hammerton was last seen leaving Harrogate hospital on the morning of Saturday 3 November 2012. It is believed he is likely to be in a confused state of mind.
Mr Roskell is white, with a stocky build and short grey hair.
When he was last seen he was wearing a green patterned jumper, grey trousers and black shoes. It is also believed that he has a blue dressing gown with him.