Hello. I recently dug up a privy behind my 1873 house in New Orleans. I' m wondering if I found the oldest privy on the property and need help dating the dig. I set up a quick website with pictures of the bottles at http://www.moviedesign.com/privy/ .None of the bottles are open pontiled and only one or two have a seem on the lip. Any help would be appreciated. Here is a group picture from the dig.