David,
I've very little information on the Luhn family. I do have some photos of my great-grandmother Bessie Luhn Liebman. I am Charles Gruss' second cousin. Our grandmothers were sisters. I've just made contact with him a couple of weeks ago.
I also have photos of great-great grandmother Luhn.
My email is
billcher@shentel.net. Hopefully Charles, you & I can share information.
Sincerely,
Bill Wine