Thank you for your reply.I had picked up some of this info from your suggestions.
Library of Virginia has Chancery Records, some counties with documents online, and I found #1846-004.It concerns a suit over a piece of property owned by Elizabeth Riviere, deceased.It names her brother Thomas,and sisters Alice Bush and Sarah Muse (wife of John), and a sister (deceased) who married a Hayden.
So I don't think Alice is the son of this John.
The article you suggested on the Rivieres is available at the Roanoke Library, and other places, v. 59, no. l, p. 7138-7152.I will try to get it.
Do you know that the Virginia Land Grants are also online at the Library of Virginia? Some of the Bush grants are in Jefferson, Nelson, Madison and Fayette Counties, KY.