You can find a likely Thomas Manley immigrating in 1908 at www.ellisisland.org
He was going to a friend, Mr. Martin.
In the 1910 census, there is a Thomas Manly,age 46, living in Manhattan as a boarder. His occupation was a Chauffer for the New York Taxi Co. I couldn't find him after that.
There are New York death records here, but there are several Thomas Manley's.http://www.italiangen.org/NYCDeath.stm