Brothers Frederick (left) and Thomas (right) Gretton, 1882. College educated Welsh immigrants Frederick and Thomas Gretton arrived in Pittsburgh in 1881. Two days after settling on the South Side they began working at J&L Steel. Frederick, a chemist, became interested in photography and documented the people and buildings of J&L as well as the surrounding community. Gift of the estate of Mrs. Wilbur F. Galraith, MSP 328, Detre Library & Archives at the Heinz History Center.