Simple thing – all the operator had to do was to set the signals and let a train go through the diamond. Not so simple when four trains were approaching the tower from four different directions! This would happen at any time. This would be the time the Duplainville operator became a juggler of trains, trying to get them through the diamond with a minimum of delay. The print shows a quieter moment as Soo Line’s LAKER picks up a message from the operator.
(17-1/2 x 11-1/2) on heavy paper trimmed 22 x 16