The marvellous length of the caravan set me figuring. Individual lines controlled by one wisehead and two helpers, numbering fifteen to twenty camels. I measured five camels travelling in line, including the head-ropes by which each is attached to the camel in front, and found the distance to be fifty feet. This meant that if the whole caravan travelled as one single line it would extend over thirteen miles. However, in the wide, roadless expanse of the desert, they are in the habit of forming irregularly, and often bunch together in groups of four to six lines abreast, with a gap between each massed formation, or connected by a straggling line or two. Therefore, I estimated that the grouping into four or more lines abreast about levelled up on the gaps, and arrived at the conclusion that the whole caravan travelled about as a double line, and was therefore _six to seven miles in length_. But those are cold figures and, though it is hoped that they may convey some conception of the magnitude of the _Taralum_, they do not go further. To enter into the true spirit of the great onward-moving army one must grasp the atmosphere of an old-world pilgrimage, that surrounds the cavalcade. It is all as it might have been in the far-back pages of biblical history. And these nomads, who man the caravan, are descendants of peoples of historic antiquity, they retain the grace and the dress and the breeding of their forebears, they are primitively armed, they are primitively fearless, they are primitively mounted: and in their very primitiveness throughout they are a part of the past—while the forsaken world they travel is an age-old land of infinite mystery.