Edvard Johannes Gabriel Af_Hällstrom (Finland, 01.01.1878-14.07.1957).

Chess composer of chess studies

Composer born in Helsingfors, a forest expert who composed about 6 direct and reverse problems and a score of studies.

Others 

9 endgame studies composed by him are selected by Mario Guido Garcá and can be replayed on the Dutch Website arves.org

Source: arves.org