Have you read any of the Offical Records??...see Series 1 Volume 27 ( xxvii ) Part 2.
Go to pages 536 and 537 to read the report of Captain Jesse M. Richardson for the
actions of the 42 nd Virginia Infantry during the Gettysburg Campaign.For a list of
casualties start reading on page 326 of this volume.

Have you looked for their pensions records at the Library of Virginia?

Best Regards
Donald Wall