Astrolabus

Astrolabus was a renegade Time Lord who stole the Book of the Old Time, as well as the treasures of a dozen worlds.

Biography
Astrolabus stole some star charts from Voyager. (DWM: Voyager)

As Professor Astro Labus, he set himself up as president of the Zyglot trust, while as the swami Astral Arbus, he employed Akkers to capture Zyglots. When the Doctor and Frobisher caught up with him, he pulled the Whifferdill with him into his cabinet. (DWM: Polly the Glot)

Astrolabus had the star charts tattooed onto his body. The Doctor tracked him down and he was killed by Voyager. (DWM: Once Upon a Time Lord)

A book known as the Insidium of Astrolabus was among the evil or arcane works which were kept in the Master's Tardis library. (PDA: The Quantum Archangel)