Pamela - The only Walter I have documented is my GGG Grandfather and he was just 14 years old in 1854, so he is unlikely to be the one you are in search of. I have a lot of information on the Jefferson branch that settled in Md and migrated to De, but haven't seen a 2nd Walter yet. I am interested in reviewing the source you mentioned about Md. If there's anything I can do to help you, let me know. I do have access to many of the Census records (details for 1850, 1880, 1900 and 1920 - just names for the others).