I came across this tiny bag seal a while ago and I finally got around to posting. The seal appears to read:
CS (on one side)
and
SP (on the other side)
There is a rail line somewhat near where I found the seal so it could be from the RR. The thing is, no railroads have those initials but I suppose the RR could have delivered for a different RR.
There is a Railway that goes from Richmond to Danville. I don't know what it is called now but during the war it was
"
Richmond and Danville Railroad
Company
The Richmond and Danville Railroad Company was chartered in Virginia on March 9, 1847. The construction of the line of railroad between Richmond and Danville, Virginia was completed in 1856. Wikipedia"
I have found seals from it 10 miles away. I take it as a good indicator .