I'm trying to trace some cousins of my grandmother's who emigrated to America in the late 19th and early 20th centuries. I found the ship's manifest for Eugene McMahon, who emigrated in 1915 and had a brother Thomas living at 160 East 44th Street. There are 25 Thomas McMahons shown in Manhattan in 1910. I found one living on what appears to be 44th Street with his brother-in-law Jeremiah (can't make out last name) and sister Nora (supervisor district 1, enumeration district 1345, can't make out ward). I'd appreciate any advice as to how to learn more about Thomas, Nora, or Eugene. Thank you! Diane Culhane