Some are in the DT database: Comin thro' the rye [one version at least]; Old Folks at Home [= Swanee River]; Tramp, Tramp, Tramp [by George Root]; some of the others are a bit obscure. If you could indicate the tune of the "German air" maybe we could find "Abschied". The other tune title means "The Arrival/Coming of Spring", which sounds familiar, somehow. I don't know of any words to Donauwellen except those by Al Jolson, "The Anniversary Song". Regards Murray Shoolbraid