Commenting on theatre fires in his December 1905 address to the American Society of Mechanical Engineers, Society President John R. Freeman found significant antecedents in the Brooklyn Theatre fire to the then-recent Iroquois Theatre fire, the 1881 Vienna Ringtheater fire and the 1887 Exeter Theatre Fire: stages crowded with scenery, an onrush of air from opening doors or windows, scant smoke vents over the stage, this giving rise to an outburst of smoke from under the proscenium arch with concomitant deadly effects upon upper gallery occupants. These observations, made twenty-nine years after the fact, resonate with those made on the night of the Brooklyn Theatre fire. Engineer Fred J. Manning, Engine Number 5, arriving at 11:22 p.m., testified that the scene doors were about two-thirds open, with "one or two men attempting to bring something out of these doors." Abner C. Keeny, part owner and contractor of the building, commenting on the fire the following morning, believed that the sudden inrush of air from the scenic entrance fanned the fire and triggered its spread from the stage to the theatre at large, leading to the rapid advance of smoke onto the family circle.