DOGS, ISLE OF, a district of East London, England, on the north bank of the Thames, forming the southern extremity of the metropolitan borough of Poplar (q.v.). It is enclosed on three sides by a bend of the Thames formed by Limehouse, Greenwich and Blackwall reaches, and includes Millwall (with Millwall dock) on the west and Cubitt Town on the east ; the West India docks across its northern end make of it almost an island. Greenwich Tunnel (1902) for pedestrians and vehicles passes under the river here. The whole district is occupied by docks, riverside works and poor houses. The origin of the name is not certainly known.