They aroused in Thugut a spirit of greed, not of honourable emulation. In a private letter to Pitt, dated Vienna 16th August, Spencer warned him that that Government was "neither possessed of sufficient energy and vigour, nor sufficiently actuated by the true principles on which the cause in which we are engaged ought to be conducted" to justify the demands of Thugut. They included British subsidies for Austria, though she could well support the war, and the sacrifice of British maritime conquests at the general peace as a means of ensuring the recovery of her losses on land. As to Belgium, added Spencer, Thugut looked on it "as irrecoverably lost and not worth regaining, unless with the addition of a very strong and extended barrier, composed of fortresses which he to-day plainly told us he did not think there was the least chance of taking in the course of the war, but that they must be obtained as cessions from France at the peace."[357] Thus Thugut expected that, while the Austrians were ignominiously evacuating the Netherlands, the British fleet should win French colonies valuable enough to induce France both to retire from Belgium, and to surrender to Austria her northern fortresses from Lille to Sedan or Thionville. The capture of Valenciennes and the slaughter of the _emigres_ in the Austrian garrison was the retort of the French to these day-dreams (29th August). The fall of Robespierre a month earlier, and the enhanced authority now enjoyed by Carnot enabled the authorities at Paris to press on the conquest of Belgium with an energy which set at defiance the boyish miscalculations of Pitt and the wavering plans of the Hapsburgs. Towards the close of July Pitt and Grenville saw the need of abating the rigour of their demands on Prussia. For of what use was it to move 60,000 Prussians more than 100 miles to defend West Flanders when that province was lost? Malmesbury therefore was empowered to pay the monthly subsidy of L50,000 on behalf of Great Britain and Holland, provided that Moellendorf's army attacked the French about Treves, thus lessening the pressure on Coburg's left wing. On 27th July he framed such an agreement with Hardenberg. This statesman was destined to be one of the saviours of the Prussian State in its darkest days, 1810-12; but now, as always, his conduct was shifty; and it is questionable whether he, any more than Haugwitz, dealt honourably with England. It must suffice to say that Moellendorf made not even a demonstration towards Treves. His inactivity was in part due to the withdrawal of several regiments towards Poland, though Great Britain and Holland still paid for the maintenance of the full quota on the Rhine.