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New Zealand Tablet, 13 May 1915, Page 45

Marvellous is the manner in which the periscope has forced its way to the front in the present war. And, when one learns its value in land operations, one is astonished that its virtues were not discovered sooner. Nine out of ten of us had never heard of the instrument six months ago except in connection with submarines. It has now become one of the most important items in an officer’s equipment, being of immense value in almost any form of land operations, provided sufficient light is available. It enables a man to see without being seen. In street fighting the operator can see round a corner without exposing himself to view or to the enemy’s fire. On reconaissanc© accurate observations can be made from behind a wall and completely under cover. In the trenches periscopes have proved invaluable, and have been the means already of a great saving in the lives of young officers.