Life in the cavalry.Waving sabers in battle, as the cavalryman soon learned, consumed but a small part of his time as compared with handling pickaxes and felling trees. In this photograph the cavalry detail at the Headquarters of General Adelbert Ames is breaking ground to build a camp. The men have just arrived, and the horses are still saddled. A barrel is supplying draft for a temporary fireplace, and even the dog is alert and excited. The faces gazing out of the photograph below are of men who more than once have looked death in the face and have earned their comparative rest. A pleasant change from active service is this Camp of Companies C and D of the First Massachusetts Cavalry. They had served at Antietam, at Kelly's Ford, at Brandy Station, at Gettysburg, in the Wilderness, at Spotsylvania, and in a host of minor operations before they were assigned to provost duty near the end of the war.