Wonderful to hear from you. I know of no Isaacsons from our family in London at that time, could be that she went to live with the maternal side? Basically, I know of two familys with the name Isaacson, one in the Manchester area and one in the Liverpool area. Everything goes hazy at my great grandparents generation, the immigrant generation to England. Is Isaacson the maiden or married name? If you can give me a little more information I will ask my brother, the family archivist. All the best, Eric.