Brett:I have found two William H. Mosby about this time frame,one is son of Alfred Daniel Mosby also father of John Singleton Mosby.William married Lucy Booth had son (if there is more children where I found this no other were mwntioned.)Sherman Harrison Mosby ;sherman's son Harrison 1891--1961 m. Leta Bell Payne : a son Bobby Eugene Mosby b. 1927d. 1993,second William H Mosby son of John Mosby 1792-- 1841?and Cassandra Endicott, John Mosby and family moved from Ky. to Liberty Mo. in 1828 , earlier I didn't find William listed as one of thier children and it may be that he is a Grandchild. enough guessing for now I do hope this helps!