Hi Jason,
I have Alexander Shields arriving in New York 27th March 1910 on the "Columbia" so not sure if he would get married on that date. His oldest child, Margaret was born in Pennsylvania, that must have been in 1910 as well, on the ship's manifest, he gave final destination as Pitsburg, Pa., so they may have set up there at first then moved to Rochester, shortly after.
I was looking for a Catherine on the "Columbia" only saw 1 from Row, Dumbartonshire. A Catherine McDonald, when you click on her name on ships manifest the wrong record comes back, so unable to accept or reject her.
Did you ever find the marriage certificate for Alexander and Catherine?
Tom
PS Was reading your old post, "Shiels Ellen Nute", I was born 100 yards from Myles farm in Tranent, its a small world.
PPS * destination not detonation.