“Games give you a chance to excel, and if you're playing in good company you don't even mind if you lose because you had the enjoyment of the company during the course of the game.” ― Gary Gygax
Yes you may.
Page six of the rule book. Right hand column. First paragraph.
Some Conductor Tokens allow slaves to move two spaces. Slaves moving two spaces may not move through spaces that contain slave catcher tokens, but they may move through a space containing another slave.