It is a bit unlikely that it would take 117 years (1875 to 1992) for invisible ink to become invisible, even if the deed was buried underground for that time.
This episode was released on the VHS entitled Back to the Future: A Friend in Deed and The Money Tree.
In this episode we meet Biff's great-great uncle Thaddeus and his sister-- who of course are brother and sister to Buford "Mad Dog" Tannen from Back to the Future Part III.
Clara and (animated) Doc do not appear in this episode. Jules says they have used the DeLorean to go and see Hamlet-- performed by the original cast!
The earliest film where a woman is tied to railroad tracks by a villain is Barney Oldfield's Race for a Life (1913). Not sure if its occurrence in the popular arts predates the movies, but it wouldn't be surprising.