I find from Philly City Directories, and LDS, etc., that these two had quite a few children, and were really quite well off. What at first appeared to be an odd thing, was that they had their first children, as far as I could discern, in Philadelphia (Sarah had been from Chester), and later children in Chester -- Little Brandywine -- yet he maintained an entry in the City Directories at Philadelphia. I am speculating, but believe that he maintained two addresses. One in Chester, one on Mulberry in Philadelphia. He could easily afford it! A well-to-do merchant, he may also have been the one possessing a fleet of sailing vessels that traveled to foreign ports... Does anyone have a tree on this line? I strongly suspect, from circumstantial evidence, that this tree is my own, via my ggg-grandmother, Mary Ann Ralston AYRES. Robert & Sarah are listed as having a Maria. The time is right, the city is right, the status in life is right, and there was no competing RALSTON line in Philadelphia in the later 1700's. Thanks for any leads... Vince Summers