This is not easy to describe, because I'm not sure if it's cellophane or wax paper. It really seems like a cross between the two. If I had to guess, I'd say it's old wax paper, but my husband tells me it's cellophane. In any event, it's 5.75" x 3.75" in size and is almost transparent but with a smokey color to it. There are two 1¢ green stamps affixed t it, one right-side up and the other upside down. There are two postmarks. The first is Lexington with no state name visible because of its placement over the stamp. The other appears to be Boston, Massachusetts. Both are dated August 31, 1908. The cancellation is an ovate barred cancellation which has the numeral 1 in the middle. There is no "TO" address, and I suspect that it was written on whatever was inside the envelope. I don't imagine a value can be placed on this because it's not really any subcategory I can think of, unless there is a "Strange Covers" category. But I would love thoughts on it.