If the fall of that town impaired the reputation of the royalists, it added to their strength by the arrival of the four thousand men who had formed the garrison. But the want of ammunition condemned the king to the same inactivity to which sickness had reduced his adversaries. Henrietta endeavoured to supply this deficiency. In May a plentiful convoy [a] arrived from York; and Charles, before he put his forces in motion, made another offer of accommodation. By the Lords it was received with respect; the Commons imprisoned the messenger; and Pym, in their name, impeached the queen of high treason against the parliament and kingdom.[b] The charge was met by the royalists with sneers of derision. The Lords declined the ungracious task of sitting in judgment on the wife of their sovereign; and the Commons themselves, but it was not till after the lapse of eight months, yielded to their reluctances and silently dropped the prosecution.[1] In the lower house no man had more distinguished himself of late, by the boldness of his language, and his fearless advocacy of peace, than Edmund Waller, the poet. In conversation with his intimate friends he had frequently suggested the formation of a third party, of moderate men, who should "stand in the gap, and unite the king and the parliament." In [Footnote 1: Journals, 104, 111, 118, 121, 362. Commons' Journals, May 23, June 21, July 3, 6, 1644, Jan. 10.] [Sidenote a: A.D. 1643. May 20] [Sidenote b: A.D. 1643. May 23] this work they calculated on the co-operation of all the Lords excepting three, of a considerable number of the lower house, and of the most able among the advisers of the king at Oxford; and that they might ascertain the real opinion of the city, they agreed to portion it into districts, to make lists of the inhabitants, and to divide them into three classes,--of moderate men, of royalists, and of parliamentarians. The design had been communicated to Lord Falkland, the king's secretary; but it remained in this imperfect state, when it was revealed to Pym by the perfidy or patriotism of a servant, who had overheard the discourse of his master.[a] Waller, Tomkins his brother-in-law, and half-a-dozen others, were immediately secured; and an annunciation was made to the two houses of "the discovery of a horrid plot to seize the city, force the parliament, and join with the royal army."[1]