We don't know much about Captain A. Montgomery other than what is on his grave stone. He was a Mason, he served in the Mexican War of 1846 and he died in Portland at the age of 73 and is buried in the first grave sold in Section C.
In the 1930's, the cemetery was the scene of much vandalism. This marble stone originally was upright and when it was vandalized, the cemetery had it reset to lay flat in cement. There are many stones like this at Multnomah Park.