Agnes Carolina Albertina Welin (née Hedenström) (15 May 1844 – 23 June 1928) was a missionary who was born in Sweden.

She hoped to be sent by a British missionary society to India or China but illness prevented her leaving England.

That building was too small and an appeal raised money and the attention of Thomas Denny, Lord Blantyre and David Carnegie who formed a committee to modify buildings under the guidance of Richard Harris Hill.

The Scandinavian Seamen's Temperance Hostel opened on 13 February 1888 near East India Docks.

Welin's original clientele of Swedish seaman were no longer there and the building was converted to be a home for homeless men.