Last year I built a corner cabinet period piece and the plans called for ship lapped jointed vertical boards for the backing of the piece. I'm getting ready to build a Secretary period piece and the plans indicate horizontally placed back boards. I personally like the 'vertical' look and will go that way unless that is not the proper orientation for this style of a period piece of that era. For reference, the piece I want to build is from Glen Huey's book "Illustrated Guide to Building Period Furniture." Thanks for any suggestions.