Meantime, the conduct of Prince Maurice in these last days of the campaign was the subject of biting censure by friend and foe.  The military fame of Spinola throughout Europe grew apace; and the fame of his great rival seemed to shrink in the same proportion.

Henry of France was especially indignant at what he considered the shortcomings of the republic and of its chief.  Already, before the close of the summer, the agent Aerssens had written from Paris that his Majesty was very much displeased with Spinola’s prosperity, ascribing it to the want of good councils on the part of the States’ Government that so fine an army should lie idle so long, without making an attempt to relieve the beleaguered places, so that Spinola felt assured of taking anything as soon as he made his appearance.  “Your Mightinesses cannot believe,” continued the agent, “what a trophy is made by the Spanish ministers out of these little exploits, and they have so much address at this court, that if such things continue they may produce still greater results.”

In December he wrote that the king was so malcontent concerning the siege of Groll as to make it impossible to answer him with arguments, that he openly expressed regret at not having employed the money lent to the States upon strengthening his own frontiers, so distrustful was he of their capacity for managing affairs, and that he mentioned with disgust statements received from his ambassador at Brussels and from the Duc de Rohan, to the effect that Spinola had between five and six thousand men only at the relief of Groll, against twelve thousand in the stadholder’s army.

The motives of the deeds and the omissions of the prince at this supreme moment must be pondered with great caution.  The States-General had doubtless been inclined for vigorous movements, and Olden-Barneveld, with some of his colleagues, had visited the camp late in September to urge the relief of Rheinberg.  Maurice was in daily correspondence with the Government, and regularly demanded their advice, by which, on many former occasions, he had bound himself, even when it was in conflict with his own better judgment.

But throughout this campaign, the responsibility was entirely, almost ostentatiously, thrown by the States-General upon their commander-in-chief, and, as already indicated, their preparations in the spring and early summer had been entirely inadequate.  Should he lose the army with which he had so quietly but completely checked Spinola in all his really important moves during the summer and autumn, he might despair of putting another very soon into the field.  That his force in that November week before Groll was numerically far superior to the enemy is certain, but he had lost confidence in his cavalry since their bad behaviour at Mulheim the previous year, and a very large proportion of his infantry was on the sick-list at the moment of Spinola’s approach.  “Lest the continual bad weather should entirely consume the army,” he said, “we are resolved, within a day or two after we have removed the sick who are here in great numbers, to break up, unless the enemy should give us occasion to make some attempt upon him.”