1910 Census, Brooklyn, New York, 51 Quincy St.
Nast, Sarah, head, female, white, age 68, widowed, parent of 5 children, 3 of whom are living, b. Pennsylvania, parents b. Engl., no occupation
son Cyril, age 30, single, b. New Jersey, father b. Germany, mother b. Pennsylvania, occupation - Ad. Dept. Manager, electric company
St. Hill, Ralph W., son-in-law, male, white, age 36, widowed, for place of birth New Zealand was crossed out and possibly Canada was written in above, father born Br. West Indies, mother born Eng., immigrated 1901, alien, occupation - reporter, newspaper
St. Hill, Thomas N., grandson, male, white, age 15, single, born New Jersey, father born (New Zealand crossed out, something else written in), mother b. New York, no occupation
I found likely matches for Ralph on a number of passenger lists. I also found a few that matched Thomas with a California address and said he was born 14 Mar 1895 in East Orange, New Jersey. The California death index at rootsweb.com has a Thomas Nast Sthill, born 3/14/1895 in New Jersey and died in Mendocino on 9/10/1985. His mother's maiden name was Nast.
