(14) Sentinels on post doing interior guard duty conform to the foregoing principles, but salute by presenting arms when armed with the rifle.

The report of the architect shows the supposed difference of the expense that would be incurred in the event of the construction of the building with wings, in taking down the edifice now occupied by the Department of State, or repairing it so as to render it fireproof and make its outside conform to the other parts of the new building.