Africana Historic Postcard Collection.

New from the Library of Congress, more than 1,500 digitised photograph postcards from European colonial territories from the 1890s – 1960s. Most before 1930.

Most are photos from colonial administrators and European missionaries. There are also ethnographic items and some  unique African photographer works including : Demba N’Diaye from Senegal, W.S. Johnston from Gold Coast (now Ghana) or Sierra Leone, F.W.H. Arkurst from Gold Coast, Frederick Grant from Gold Coast, N. Walwin Holm from Gold Coast and Alex Agbablo Accolatse from Togo. 

The blog explains more.