Norfolk, it was clear, had gone upon the service most reluctantly. He, too, had deeper sympathy with the movement than he cared to avow; but, even from those very sympathies, he was the fittest person to be chosen to suppress it. The rebels professed to have risen in defence of the nobility and the Catholic faith. They would have to fight their way through an army led by the natural head of the party which they desired to serve.[144] The force under Shrewsbury was now at Doncaster, where, on the 25th, the Duke joined him. The town was in their hands, and the southern end of the bridge had been fortified. The autumn rains had by this time raised the river, securing their flank, and it would have been difficult for an attacking army to force a passage, even with great advantage of numbers. Their situation, at the same time, was most precarious; of the forty thousand men, of whom Shrewsbury had written to Lord Hussey, he had not been able to raise a tenth; and, if rumour was to be believed, the loyalty of the few who were with him would not bear too severe a strain. With Norfolk's reinforcements, the whole army did not, perhaps, exceed eight thousand men, while even these were divided; detachments were scattered up the river to watch and guard the few points at which it might be passed. Under such circumstances the conduct which might be necessary could only be determined on the spot; and the king, in his instructions, left a wide margin of discretion to the generals.[145] He had summoned the whole force of the south and west of England to join him in London, and he intended to appear himself at their head. He directed Norfolk, therefore, to observe the greatest caution; by all means to avoid a battle, unless with a certainty of victory; and "the chances of war being so uncertain," he said, "many times devices meant for the best purpose turning to evil happs and notable misfortunes," he advised that rather than there should be any risk incurred, the duke should fall back on the line of the Trent, fortify Newark and Nottingham, and wait on his own arrival; "until," to use the king's own words, "with our army royal, which we do put in readiness, we shall repair unto you, and so with God's help be able to bear down the traitors before us; yourselves having more regard to the defence of us and of your natural country than to any dishonour that might be spoken of such retirement, which in the end shall prove more honourable than with a little hasty forwardness to jeopard both our honour and your lives." "For we assure you," he said "we would neither adventure you our cousin of Norfolk, nor you our cousin of Shrewsbury, or other our good and true subjects, in such sort as there should be a likelihood of wilful casting of any of you away for all the lands and dominion we have on that side Trent."