Ireland also was visited by political spies, passing as commercial agents. It may not be easy to say how far Emmet's rebellion, to be recorded hereafter, was the result of these visits. At all events a letter fell into the hands of the British government, addressed by Talleyrand to a French agent at Dublin, called Fauvelet, directing him to obtain answers to a series of questions about the military and naval circumstances of the district, and "to procure a plan of the ports, with the soundings and moorings, and to state the draught of water, and the wind best suited for ingress and egress". The British government naturally complained of these instructions, but Talleyrand persistently maintained that they were of a purely commercial character.[7] It is, of course, true that these preparations in view of a possible recurrence of hostilities, however obvious their intention, were not in themselves hostile acts. Still, they were just grounds for suspicion, and, with our retrospective knowledge of Napoleon's later career, we may seek in vain for the grounds of confidence which had made the conclusion of a treaty possible. Great Britain was guilty of more direct breaches of the peace of Amiens. Russia refused her guarantee for the independence of Malta, and the British government was therefore technically justified in retaining it. No similar justification could, however, be alleged for the retention of Alexandria and the French towns in India. These measures were, as will be seen, defended on broader grounds of public policy. Not the least of the causes of discontent with the new situation was the refusal of Napoleon to follow up the treaty of peace with a commercial treaty. He had even retained French troops in Holland, and thus shown that he meant to close its ports against British commerce. The hope of a renewal of trade with France had been a main cause of the popular desire for peace, and had reconciled the British public to the sacrifices with which the treaty of Amiens had been purchased. It soon became clear that further concessions would be made the price of a commercial treaty, and it was felt in consequence that the sacrifices already made were made in vain.