This is an interesting cover. Someone has written on the front that it was sent in 1879 but someone has also written on the back that it was answered on 12/28/1880. Seems to be a bit of a date discrepancy as it would mean that it took 18 months for the receiver to respond.
The other strange thing with this cover is that the post office cancel is from "Sweedgrove", which doesn't seem to have existed as a post office under that name.