Chris,
Is this the man you're looking for?
Name: James P. Baltimore
Regiment Name: Capt. Snead's Company, Virginia Light Artillery (Fluvanna Artillery)
14-page Compiled Military Service Record
He also has a second 8-page CMSR with:
Name: James P. Baltimore
Regiment Name: Capt. Ancell's Co., Virginia Light Artillery
You can obtain these service record and his pension file through the link below or by clicking on the ad at the top of this page.
Jim Martin