Quote1 Now to find out who the heir is from the will they thought I burned! Elaine Martin-- the first to do away with Quote2
-- the Skeleton src

According to the Spider, the Skeleton was the last remnant of a line of murderously insane secret relatives of the Martin family. He killed the family's lawyer, and tried to kill another heir, and Elaine Martin, but was thwarted by The Spider. Whoever he was, he looked very much like Elaine Martin's late grandfather. He was last seen falling into an underground river.

Enemy of Tom Hallaway, alias the Spider