I found that on-line at http://www.rootsweb.ancestry.com/~chalkley/
3 volumes, a total of 1800 pages — ambitious!
I saw that yesterday! I’ll have to go rummaging through it.
When I was in Pearisburg a few years ago doing some research, I visited the Giles County Historical Society. Very nice folks. They also have a pretty good gift shop :-) Anyhow, they had a copy of the complete volume set of Chalkley in there so I snagged it for my dad for Christmas. Read through some of it before I gave it to him and was very impressed at the level of detail.