For the next ten days the weather was so bad that no operations could be carried on.

Every little stream was swollen to a raging torrent.
Horses, carrying men in full armour, could scarce keep their feet on the slippery moor; and even the footmen had the greatest difficulty in getting about; and all excursions were given up, for the Welsh, barefooted and unweighted with armour, would have been able to fall upon them to great advantage, and could then evade pursuit, with ease.
The number of sick increased rapidly, and it became necessary to send another convoy back to Llanidloes; where the guard were to join the force that had gone there, ten days before, and to escort some waggons of flour and a number of cattle, that had been brought there from Welshpool by a strong levy from Shropshire.
Ten knights, a hundred mounted men-at-arms, as many on foot, and fifty archers were considered sufficient to escort the sick; who, to the number of two hundred, were closely packed in the ten waggons that were to return with flour.

Three of Lord Talbot's knights were to form part of the escort, and among these Oswald was chosen by the earl.
It was hoped that the convoy would reach the town without being attacked, for great pains had been taken to prevent the news of its approaching departure getting about; for there were many Welshmen in the camp, employed in looking after the baggage animals, and in other offices.

They had all been hired for the service on the other side of the border; but it was believed that some of them, at least, must be in communication with the enemy; who were thereby enabled to gather in force, to oppose any parties who sallied out from the camp.
The consequence was that, until half an hour before it left, none save a few of the leaders were aware of the starting of the convoy.

Then orders were rapidly issued.