John Davis wrote "All Are Talking of Utah" and it first appeared in 1868 in "The Bee Hive Songster, published in Salt Lake City. Several othr Mormon songs use the same tune. Source: Mormon Songs from The Rocky Mountains, Ed. T. H. Cheney.
There are threads on Marching Through Georgia and its composer. I will check in a few minutes, but you should have no problem finding the info. here.