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160 During the day several minor officials of the department might have been, and indeed were, observed going about their business with painfully tight-lipped expressions.

Also many messages were transmitted by wireless, telephone, and telegraph, to various persons charged with the defense of the Atlantic Coast; some of these were code messages, some were not.

That same night a great forest fire sprang up on the south shore of Martha's Vineyard, both preceded and accompanied by a series of heavy explosions.

The first United States vessel to reach the lagoon found only charred remains of a landing stage and several buildings and, at the bottom of the lagoon, an incoherent mass of wreckage, a twisted and shattered chaos of steel plates and framework that might possibly have been a perfectly sound submarine, though sunken, had somebody not been warned in ample time to permit its destruction through the agency of trinitrotoluene, that enormously efficient modern explosive nicknamed by British military and naval experts "T. N. T.," and by the Germans "Trotyl."