I believe I have some information that might be useful.I have him listed as Arthur E. Lagore born 12/9/1880 married to Maria Cramblit born 9/23/1884.Arthur E. Lagore or as you have Arthur A. Lagore was the oldest son of Susannah Deaver born 5/24/1857 who married George Washington Lagore.
Susannah and George Lagore had the following children,
Arthur, James William born 4/5/1886, Mary Ann Lagore born 3/11/1887, Florence Rachel born 8/29/1890, Earl William born 12/3/1892, Peter Simon born 8/23/1897 (this is my Grandfather) and Robert Francis 1/2/1900.
My grandfather married Helen and they had five sons.
Arthur, George, William, David (my father) and Stan.
I have more information on the children born to the other brothers and sisters of Arthur, if you would like me to send it.Most of the children of Susannah and George Lagore ended up in Alberta Canada.