All lorries are, of course, inscribed with a W.D. number, duly registered at G.H.Q., and from this their histories can be immediately traced. Different supply columns and ammunition parks choose and register distinguishing marks of their own—almost like trade-marks: the Bee, Bluebird, Black Cat, Bulldog, are all to be seen, to give only a few examples. The origin of these distinctive marks is a matter of some interest. When the 1st Indian Cavalry Supply Column arrived in France in November 1914, there were, of course, far fewer lorries in the country than there are to-day. At this time there was a General Routine Order to the effect that all motor-lorries were to have affixed to the outside of their tailboards a large white card, 15 inches square, with a red danger bull’s-eye, 6 inches in diameter, in the centre of the card. Cards of this size and description were accordingly issued, one to each lorry, to be nailed on the back, the idea being that, at night especially, the driver of a lorry would be able to distinguish a lorry in front by the aid of his headlights shining on to the bull’s-eye and thus avoid collision. The idea was a good one, but the inventor did not take into account the weather conditions that prevailed during the winter of 1914 in the North of France, for in less than no time the cards became pulp, destroyed by the constant rain. We therefore did away with the cards and painted lasting facsimiles in red and white where the cards had been. But even this was not everything that was required, as the lorries of our Supply Column were not easily distinguishable from those of others. To overcome this, a special mark was painted over the bull’s-eye and square. This was the origin of all the distinguishing marks in existence at present amongst the various —— Supply Columns and Parks. Every lorry and car is equipped with a complement of tools, necessary for adjustments and the carrying out of roadside repairs. The tools are all entered up in the log-book with which each vehicle is provided for the purpose, the driver signing a receipt for them in it, when taking over the vehicle, and having to make good any deficiencies that can be traced to his own neglect when he is transferred to a different vehicle and "hands over" to the driver succeeding him. The multifarious duties of the motor-lorry convoys continue in all weathers and at all times of day and night. Carrying as they do every imaginable material, from bread and meat to stones and coal, they do not work by time-tables, nor do definite hours end and begin their day’s work, so that a high-pressure state of readiness has to be constantly maintained, this being only possible by perfect organization and the closest attention to the most minute details, which can alone pave the way to thoroughness.