Ephraim G Briggs, b. NY abt 1820, suddenly appears in the 1850 Census for Linn, Osage, MO, recently married to Elizabeth B Smith b. KY. They then disappear. I'm trying to find out if this is Ephraim Grummon Briggs, son of Philip & Sarah (Grummon) Briggs of Ellenville, Ulster, NY. He wrote a letter from Jacksonville FL in 1840 and then disappeared. Could he be the E Briggs who died in St Louis in 1852? Thank you for any assistance.