Crawford's Case

This appeal from an award of compensation by the Industrial Accident Commission must be sustained. Written notice *376of the accident was not given to the employer within thirty days after the happening thereof, and the facts negative knowledge by the employer or its agent, or a mistake excusing delay. Sections 17, 18, and 20, of the Compensation Act, bar the maintenance of this proceeding.

The term “mistake,” as used in the Act, has recently been construed by this Court in Brackett’s Case, 126 Maine, 365. Relying on the fundamental principles that the “mistake” must be one of fact and not of law,…