Heretofore

They produced a state of poverty heretofore unheard of in England.

The book narrates the heretofore untold story of Tom Jackson, a nurse from Boston.

Tom has reached heretofore unseen levels of annoying.

We now make available these works which were heretofore unpublished.

For quotations using this term, see Citations:heretofore.

The Permanent Way: Britain's Railroads in the Making. By Horace Greenleaf and G. Tyers. […]There is no doubt that the permanent way has failed heretofore to attract popular interest to an extent comparable with its importance, but possibly the publicity given recently to various forms of experiment is tending to change this.

heretofore referred to as

heretofore mentioned