Ardie Knowlton was a student at G.U.E. Tech during the time of the Lurking Horror, who had the telephone number: "x 2981". Ardie was the chemistry lab partner of the unknown student who found the horror below the famed institution. While attending the class, the two met at the lab on Gruesday and Birthday from 1:00~3:00PM.

SOURCE(S): The Lurking Horror (G.U.E. Tech at a Glance)