"I know she had, Doc," put in the C.O. heartily. "And when I think of the way you eased her sufferings I became lost in admiration over the noble nature of your calling. In the meantime I'd be glad if you'd see one of the men in the Head-quarters Section. From the strange explosive noises he made when I spoke to him before breakfast I gathered by the aid of an interpreter that he had somewhat foolishly placed his complete set of uppers and lowers on a truss of compressed hay, and one of the mules has eaten them." He strolled to the door on his way to the kitchen in the next house that served as his office. "You'd better be careful with that rum jar, Jacko. Unless you're pretty certain there's no danger, I'd put a slab of gun-cotton against it where it is, and pop her off. No sense in running any risks carrying it back." "Right-ho! I'll have a look as soon as I go up. Are you coming, Mac?" He turned to the Scotchman. "In five minutes, my boy. I have to perform a few blasting operations on my pipe before I start, and then I'm with you." He pulled a battered veteran out of his pocket, and peered into its noisome bowl. "Not indoors, man, for heaven's sake!" The Doctor backed hurriedly out of the room. "The last billet you cleaned your pipe in they complained to the Mayor of the village." "Go away, Doctor, go away. Go and put chloride of lime round the cook-house," Mac was shouting through the window at the receding medico. "And ask yon woman if she has a hairpin. My pipe. . . ." But the Doctor was out of sight. Ten minutes later the room was empty save for a batman clearing the breakfast table. * * * * * * Now as a general rule the Sappers do not live in the trenches, but go up there each day and most nights, the remainder of the time being spent in dwellings of dubious sanitation and indubitable draughtiness a mile or so in rear. To each company a certain front is allotted, and it is their joy and pride to maintain this front and the network of trenches behind it spotless and untarnished, what time they minister ceaselessly to the lightest whim of its heroic defenders--usually known by the generic term of P.B.I., or poor bally Infantry. Which, of course, is not what really happens, but one likes to think thus beautifully. In addition to the Infantry, other people thrust themselves forward in a manner which requires firmness and tact to deal with: gunners require O.P.'s, or observation posts; other gunners require trench mortar emplacements; dangerous men with machine guns sit up and take notice, and demand concrete and other abominations; while last, but not least, the medical profession demand secret and secure places in which to practise their nefarious trade. Finally, the Ordnance Department is with one always. It was that branch of the great Machine which caused the frown on the face of the Sapper Captain, hitherto alluded to as the O.C., while next door the batman cleared the breakfast table.