Well done that man :lol: :lol: you did well!
Your unknown brackets, I may be wrong but do they not go under the lathe bed to clamp the tail stock onto the bed.
Look under the tailstock, does it have bolts coming out of the bottom and do they line up with the holes in the brackets.
If not the tailstock, then maybe the tool rest banjo.
Oh, and the Henry Taylor, should have a number stamped on it that will tell what it is.
John. B