Can someone help my find out what some of these old iron objects are. Most of them are stuck in a old white oak tree, I'm thinking they are probably 1800s. the one in the last photo I think is a part of a 1800s plow, but I could be wrong, it was also on top of the other objects.
Here's a diagram for anybody here who doesn't know what a singletree (or a doubletree, or a neckyoke, etc>) is. Also, a photo showing a modern version (which happens to be all metal) in use.