According to a company report "He got out of an open carriage at Minffordd Junction, on the wrong side, and walked over the edge of the parpet of the Cambrian Railway bridge there, falling onto the platform below...." It is presumed the trainhad stopped before coming into the station properly.
He died a few days later, from injuries (3rd September)
Boyd further comments on if the practice of locking doors on both sides was being carried out. 
- Johnson, Peter (2007). An Illustrated History of the Festiniog Railway. Hersham: Oxford Publishing Co. ISBN 0-860936-03-1. OCLC 180463433. p45
- Boyd, James I.C. (1975) . The Festiniog Railway 1800 - 1974; Vol. 1 - History and Route. Blandford: The Oakwood Press. ISBN 0-8536-1167-X. OCLC 2074549. p572