While crossing this dry expanse, the greatest difficulty I had to contend with was the provision of sufficient water for the three thousand workmen employed about railhead, for not a drop could be obtained on the way, nor could we hope for any until we had got to the other side of the plain and had reached the Athi River, which could not be accomplished under a couple of months. As we progressed onwards into the waterless belt, this became a very serious matter indeed, as any breakdown in the supply would have had the most disastrous consequences among so large a body of men working all day under the blazing sun of a tropical climate. Every day two trainloads of water in great tanks were brought up from the last stream we had passed, which, of course, daily fell further to the rear. This was a source of considerable delay, for the line was blocked all the time the water was being pumped into the tanks, and consequently no material for construction could come through; and a good deal of time was also wasted, when the trains returned to railhead, in distributing the water to the workmen, who often quarrelled and fought in their eagerness to get at it. At first I had most of the tank-filling done by night, but on one occasion a lion came unpleasantly close to the men working the pump, and so night work had to be abandoned. The coolies themselves were so anxious, indeed, to get a plentiful supply of water, that once or twice some of the more daring spirits among them ventured to go out on to the plains in search of waterholes, which, by reason of the large herds of game, we knew must exist somewhere. The only result of these expeditions, however, was that three of these men never returned; what befell them is not known to this day.