Attack on Base Hospital No. 5 in WW I That Resulted in 1st American Deaths in France-- Part 3

Lt. William T. Fitzsimons heard the explosions and summoned Private Hiram Brower to find out what was going on.  The private told him and then went on about his patrol.  Scarcely a minute had passed when there was another explosion.  An aerial torpedo had been dropped at General Hospital No. 18, but it landed in an athletic field and did no damage other than making a deep hole several yards wide.

The plane then went into a semicircular course and a similar bomb was dropped into the reception tent of General Hospital No. 4, followed almost immediately by two bombs dropped within about eighteen inches of each other in from of Lt. Fitzsimons' tent.

He was killed instantly by the first two bombs and then three others were dropped.

I have been unable to find out how these bombs were dropped.  I would say definitely not from bomb bays like in World War II.  I believe most likely by the pilot or another crew member if they had others, dropping them over the side of the plane.