Jonathan Sheppard Books, Box 2020, ESP Station, Albany, New York 12220 "Serving Genealogists and Historians Since 1977 has a Packet No. S24, Virginia, with Delaware, Maryland, and West Virginia - 1864.

It's a rather small scale map, but with a magnifying glass you may be able to identify the roadways you seek.

I cannot locate Mechancsville on the map, but believe it to be in the vicinity of Cold Harbor.

Roads are pretty well deliniated.

I paid $6.95 for my copy, but that must have been some 8 years ago.

Their webpage then was: www.jonathansheppardbooks.com

George Martin