"How did the tank happen to be invented?" is a common question. The answer is that in past wars experience has made it an axiom that the defenders suffer more casualties than the attacking forces. From the first days of 1914, however, this condition was reversed, and whole waves of attacking troops were mown down by two or three machine guns, each manned, possibly, by not more than three men. There may be in a certain sector, before an attack, an enormous preliminary bombardment which is destined to knock out guns, observation posts, dumps, men, and above all, machine-gun emplacements. Nevertheless, it has been found in actual practice that despite the most careful observation and equally careful study of aeroplane photographs, there are, as a rule, just one or two machine guns which, either through bad luck or through precautions on the part of the enemy, have escaped destruction. These are the guns which inflict the damage when the infantrymen go over and which may hold up a whole attack. It was thought, therefore, that a machine might be devised which would cross shell-craters, wire and trenches, and be at the same time impervious to bullets, and which would contain a certain number of guns to be used for knocking out such machine guns as were still in use, or to lay low the enemy infantry. With this idea, a group of men, in the end of 1915, devised the present type of heavy armoured car. In order to keep the whole plan as secret as possible, about twenty-five square miles of ground in Great Britain were set aside and surrounded with armed guards. There, through all the spring and early summer of 1916, the work was carried on, without the slightest hint of its existence reaching the outside world. Then, one night, the tanks were loaded up and shipped over to France, to make that first sensational appearance on the Somme, with the success which warranted their further production on a larger and more ambitious scale. II FIRST DAYS OF TRAINING We were at a rest camp on the Somme when the chit first came round regarding the joining of the H.B.M.G.C. The Colonel came up to us one day with some papers in his hand. "Does anybody want to join this?" he asked. We all crowded around to find out what "this" might be. "Tanks!" some one cried. Some were facetious; others indifferent; a few mildly interested. But no one seemed very keen about it, especially as the tanks in those days had a reputation for rather heavy casualties. Only Talbot, remembering the derelict and the interest she had inspired, said, with a laugh,-- "I rather think I'll put my name down, sir. Nothing will come of it, but one might just as well try." And taking one of the papers he filled it in, while the others stood around making all the remarks appropriate to such an occasion. Two or three weeks went by and Talbot had forgotten all about it, in the more absorbing events which crowded months into days on the Somme.