In 1969 the guitarist Christian Vaeillant and the drummer Robert Cager joined and Ellison was formed.
They were part of l’Association Des Orchestres (under the direction of Jean-Claude Brosseau) wich were specialize in Quebec's underground music, hard rock and blues.

In 1971 they made most of their shows on college's campus and in schools and begun creating a popularity.
In March 1972, they started recording their only album with the help of the label Supreme (6) and released it on October 27, 1972 at the Campus Pont-Viau.
On March 31, 1973 Ellison made a show in Montreal and since then no more show were mentionned.
They were one of the most prolific band in the underground music scene with ExCubus (Incubus), Expedition, Lasting Weep and many more.