Before he sought his couch Burnet had a talk with Ellingford.
"I'm jolly glad you are back," said the latter. "Not one of these Arabs knows a word of English, and to be over a week without any means of communication but dumb show has been a horrid nuisance. I managed to make them understand that they had better rig up some sort of a fortification at this end of the causeway as a defence against machine-gun fire, and I was thinking of placing my gun there, for things are getting warmer every day. There's no need for that now, perhaps: the two guns you've brought are enough on such a narrow front: but we've all our work cut out to hold the enemy off until relief comes."
"By the way, I've orders for you to return if you're fit," said Burnet. "The Tommies I've brought will patch up your tank."
"That's rough luck. I wanted to stay here and see it through. I'm fit enough, for a short flight at any rate, but I don't like running away."
"You can do a little useful scouting for us before you return to the lines. We'll talk about that later. To-morrow you had better get your tank repaired. The men are handy fellows, and they'll do what's required under your instruction. We're evacuating the non-combatants and the horses, and I hope our food will last out until we're relieved. That's the only risk—unless the enemy bring up artillery and shell us. Even then we may still have a chance, because there are underground chambers here and there under the ruins—places excavated long ago for shelter from the heat; and they ought to prove effective dug-outs. The greatest danger is that the Turks will repair or bridge the causeway and overwhelm us with numbers. I shall have a look round to-morrow and see what can be done to prevent them."
Next day Burnet resumed his own uniform and went round the position with Rejeb. It appeared that when the non-combatants were gone, under escort of a sufficient number of armed men, the effective strength of the garrison would slightly exceed four hundred. The enemy, at a rough estimate, outnumbered them by three to one, and were on the whole better armed; the rifles and ammunition captured on the launch were sufficient to arm about a third of Rejeb's force. The food supplies might with care last for a week or two. Plenty of drinking water was to be got from an old well which the Arabs had cleared out at their first occupation of the island.
The weakness of the defence was that a wide front—for it was not merely a question of holding the end of the causeway—had to be held by relatively small numbers. The channel between the island and the Turkish position was too deep to wade; but it was obvious that an enterprising enemy with a large preponderance of numbers would not find it an insuperable obstacle, and with half the causeway in their possession they could harass the defenders until an attack in overwhelming force was possible.
Burnet saw that his first concern must be to prevent the enemy from pushing farther along the causeway. That should be practicable. It was more doubtful whether he would be able to dislodge them from the position they had already gained.
The sudden outburst of fire from the Turks on the previous evening had soon died down when they found that the Arabs made no attack, and so far the morning had been quiet. Taking advantage of their inactivity, Burnet went cautiously to the end of the causeway, examined the breastwork which the Arabs had constructed with material from the ruins, and cast about for an emplacement for one of his machine-guns. His first idea was to instal it in a sort of blockhouse in the middle of the breastwork, from which it could sweep the causeway from end to end. But there was always a chance that the Turks would ultimately bring up field artillery; the blockhouse would then be their first objective, and the gun would very likely be put out of action. The second gun, which he intended to keep in reserve, might suffer the same fate. What then could be done?
The breastwork hastily erected by the Arabs across the end of the causeway was neither long enough nor strong enough. But along the shore of the island ran a low artificial embankment against floods. Just behind it was an old, much dilapidated wall. About a hundred and fifty yards on the right of the causeway the embankment had broken away. It was only necessary to break an opening in the wall just behind this gap, to form a sort of embrasure for the gun. The position was well screened from the enemy, for the surface of the island rose slightly in the rear, and the horizon, from the Turks' point of view, was cut by the chief's tower with the dwarf trees that flanked it. Placed in this embrasure, the machine-gun would command the whole of the causeway except the fifty yards nearest the island.