Although I don't have a marriage date for Horatio and Louise, I do have the information of when they came to US. They departed from Liverpool, England in Oct 1966 on board the ship ETNA Ln 58. They were on the water for two weeks and arrived in New York on 11/15/1866.They had their infant son, Earnest Harvey Allen, with them.
The information you posted was of help to me also.I had info of Louisa born abt 1839 in England. I had info on Horatio as born in England about 1831.
I was at a stand still.Horatio and Louisa are my great-great grandparents on my paternal grandmother's side.If you have any other information back further than them...their parents, siblings, etc. I would appreciate it.