These reference books are available in the St. Louis Public Library - Genealogy (Compton Branch)
Title - The Herndon family of Virginia. Volume one, The first three generations Author- Herndon family (William Herndon, 1649-1722). Publisher:Betty Fagan Burr,Pub date:1986. Pages:62 p. ; ISBN:0911619046I tem info: 1 copy
Title - The Herndons of the American Revolution : being the Herndon family of Virginia, volume 2 Author - Herndon, Dudley L. Publisher:Gateway Press;Pub date:1992-<1994 >Pages:v.
While the Central Library is being renovated, the Genealogy Library has relocated to Compton Branch, 1624 Locust Street(314) 539-0385 St. Louis, MO63103 9am - 5pm Monday-Friday 9am - 5pm First Saturday of the month
You may also search on the World Library Catalogy http://www.worldcat.org/http://www.worldcat.org/ to locate those two books closer to you. Hope this helps.