Rualla horsemen, led by Trad, dashed down the long slope and over the liquorice-grown bed of the watercourse to the line. Young bounced after them in his Ford. From the ridge we thought the railway taken without a shot, but while we gazed, suddenly from the neglected Turkish post came a vicious spitting fire, and our braves, who had been standing in splendid attitudes on the coveted line (wondering privately what on earth to do next) disappeared.

Nuri Said moved down Pisani's guns and fired a few shots. Then the Rualla and troops rushed the redoubt easily, with only one killed. So the southern ten miles of the Damascus line was freely ours by nine in the morning. It was the only railway to Palestine and Hejaz and I could hardly realize our fortune; hardly believe that our word to Allenby was fulfilled so simply and so soon.

The Arabs streamed down from the ridge in rivers of men, and swarmed upon the round head of Tell Arar, to look over their plain, whose rimmed flatness the early sun speciously relieved, by yet throwing more shadow than light. Our soldiers could see Deraa, Mezerib and Ghazale, the three key-stations, with their naked eyes.

I was seeing further than this: northward to Damascus, the Turkish base, their only link with Constantinople and Germany, now cut off: southward to Amman and Maan and Medina, all cut off: westward to Liman von Sandars isolated in Nazareth: to Nablus: to the Jordan Valley. To-day was September the seventeenth, the promised day, forty-eight hours before Allenby would throw forward his full power. In forty-eight hours the Turks might decide to change their dispositions to meet our new danger; but they could not change them before Allenby struck. Bartholomew had said, Tell me if he will be in his Auja line the day before we start, and I will tell you if we will win'. Well, he was; so we would win. The question was by how much.

I wanted the whole line destroyed in a moment: but things seemed to have stopped. The army had done its share: Nuri Said was posting machine-guns about the Arar mound to keep back any sortie from Deraa: but why was there no demolition going on? I rushed down, to find Peake's Egyptians making breakfast. It was like Drake's game of bowls, and I fell dumb with admiration.

However, in an hour they were mustered for their rhythmic demolition by numbers; and already the French gunners, who also carried gun-cotton, had descended with intention upon the near bridge. They were not very good, but at the second try did it some hurt.

From the head of Tell Arar, before the mirage had begun to dance, we examined Deraa carefully through my strong glass, wanting to see what the Turks had in store for us this day. The first discovery was disturbing. Their aerodrome was alive with gangs pulling machine after machine into the open. I could count eight or nine lined up. Otherwise things were as we expected. Some few infantry were doubling out into the defence-position, and their guns were being fired towards us: but we were four miles off. Locomotives were getting up steam: but the trains were unarmoured. Behind us, towards Damascus, the country lay still as a map. From Mezerib on our right, there was no movement. We held the initiative.

Our hope was to fire six hundred charges, tulip-fashion, putting out of commission six kilometres of rail. Tulips had been invented by Peake and myself for this occasion. Thirty ounces of gun-cotton were planted beneath the centre of the central sleeper of each ten-metre section of the track. The sleepers were steel, and their box-shape left an air-chamber which the gas expansion filled, to blow the middle of the sleeper upward. If the charge was properly laid, the metal did not snap, but humped itself, bud-like, two feet in the air. The lift of it pulled the rails three inches up: the drag of it pulled them six inches together; and, as the chairs gripped the bottom flanges, warped them inward seriously. The triple distortion put them beyond repair. Three or five sleepers would be likewise ruined, and a trench driven across the earthwork: all this with one charge, fired by a fuse, so short that the first, blowing off while the third was being lighted, cast its debris safely overhead.

Six hundred such charges would take the Turks a fair week to mend. This would be a generous reading of Allenby's 'three men and a boy with pistols'. I turned to go back to the troops, and at that moment two things happened. Peake fired his first charge, like a poplar-tree of black smoke, with a low following report; and the first Turkish machine got up and came for us. Nuri Said and I fitted admirably under an outcrop of rock, fissured into deep natural trenches, on the hill's southern face. There we waited coolly for the bomb: but it was only a reconnaissance machine, a Pfalz, which studied us, and returned to Deraa with its news.

Bad news it must have been, for three two-seaters, and four scouts and an old yellow-bellied Albatros got up in quick succession, and circled over us, dropping bombs, or diving at us with machine-gun fire. Nuri put his Hotchkiss gunners in the rock cracks, and rattled back at them. Pisani cocked up his four mountain guns, and let fly some optimistic shrapnel. This disturbed the enemy, who circled off, and came back much higher. Their aim became uncertain.

We scattered out the troops and camels, while the irregulars scattered themselves. To open into the thinnest target was our only hope of safety, as the plain had not overhead cover for a rabbit; and our hearts misgave us when we saw what thousands of men we had, dotted out below. It was strange to stand on the hill-top looking at these two rolling square miles, liberally spread with men and animals, and bursting out irregularly with lazy silent bulbs of smoke where bombs dropped (seemingly quite apart from their thunder) or with sprays of dust where machine-gun groups lashed down.

Things looked and sounded hot, but the Egyptians went on working as methodically as they had eaten. Four parties dug in tulips, while Peake and one of his officers lit each series as it was laid. The two slabs of gun-cotton in a tulip-charge were not enough to make a showy explosion, and the aeroplanes seemed not to see what was going on: at least they did not wash them particularly with bombs; and as the demolition proceeded, the party drew gradually out of the danger-area into the quiet landscape to the north. We traced their progress by the degradation of the telegraph. In virgin parts its poles stood trimly, drilled by the taut wire: but behind Peake they leaned and tottered anyhow, or fell.

Nuri Said, Joyce and myself met in council, and pondered how to get at the Yarmuk section of the Palestine line to top off our cutting of the Damascus and Hejaz Railways. In view of the reported opposition there we must take nearly all our men, which seemed hardly wise under such constant air observation. For one thing, the bombs might hurt us badly on the march across the open plain; and, for another, Peake's demolition party would be at the mercy of Deraa if the Turks plucked up the courage to sally. For the moment they were fearful: but time might make them brave.

While we hesitated, things were marvellously solved. Junor, the pilot of the B.E. 12 machine, now alone at Azrak, had heard from the disabled Murphy of the enemy machines about Deraa, and in his own mind decided to take the Bristol Fighter's place, and carry out the air programme. So when things were at their thickest with us he suddenly sailed into the circus.