I am only responding on memory as, at the moment, there is no time to dig into records………..that being said, this subject has been rumbling around in my brain for so many years I can just about quote the gospel on it.

Silas was the only prospect that made since due to census in 1830 having kids the right age of Thomas & Falby.  Moses did not.  Well, what does a census prove anyway?  Also made sense because Thomas lived near White Pine on the North side of the river…………not terribly far from Silas & Elizabeth……….on 1850 census.  Three balls for Silas & three strikes for Moses.

However, there are more facts:

1840 census, Thomas lives south of the river near Muddy Creek.

As you've pointed out, Falby marries Moore & Edmonds, both on Muddy Creek.  Also marries Brimer on Muddy Creek.

1850 census, Silas and Elizabeth are in Illinois with son Elkanah.  Says he's born in Connecticut.

1860 census, Silas & Elizabeth still in Illinois, says he's born in Massachusetts.

1880 census, Thomas (and I believe Falby as well) say Dad born in North Carolina.

Pleasant Hall Death certificate says Dad is Moses and was born in North Carolina.

Probably some more in my notes but this will do for the moment.  Six strikes………Silas & Elizabeth are out.  Moses safe at home.  While there were ferrys and fords across the river in the 1830's, its still like two different worlds with the river in between.  It was very uncommon to go courtin' & sparkin' across the river.  Long Creek (White Pine) to Muddy Creek might as well have been New York & L.A. for a teen looking for a honey.

Looking for folks in 1850?  There was a mass exodus for land in those times out west, or at least the midwest.  My Lebow's and Rainwater's are found in Ray Co., Missouri by 1850.  Thomas has gone to Marion Co., Iowa. by 1853.  Silas has gone to Illinois with Elkanah.  It was not until I looked westward that I realized that Silas & Elizabeth did not die here by 1850.  You might look for the others westward.

Clay