This past week, I bought an old photo taken in the Pfalz. It says "Sister of Otto Dreyer." The woman is with a man, probably her husband, and it was taken most likely in the 1880s or 1890s. The town where it was taken is Lauterecken. Do you think this is a sister of your Otto Dreyer? Feel free to e-mail me at Lass53@aol.com
, or respond on here.