If any one among those who act under my direction, fails in his duty, I never shall hesitate in taking proper notice of it; but I will never allow any of them, whatever be his station, to be unjustly accused without defending him. When I answered Sir N. Harris Nicolas's first letter, I very briefly stated only such facts as proved the injustice of his accusation, without giving any opinion whatever: the reasons for my moderation have been given. This moderation did not avail me much. Sir N. H. Nicolas was not only dissatisfied with my letter, but, in his reply, (No. III.) he shifted his ground, and complained of "the difficulties and delay arising from the present regulations, and the state of the Catalogues." If the difficulties and delay arise from the regulations, then his complaint of neglect against the attendant was a most ungenerous proceeding; and if he thought this complaint well grounded, he would not complain of the system. As he talked of the attention of the Trustees being called to this subject, I begged of him (No. IV. and V.) to prove what he had asserted--the truth of the habitual delay, and its cause. He declined the offer (which a man, convinced of the veracity of his statements, would have willingly accepted) and wrote in a much lower tone. (No. VI.) I again called on him to specify his charges, (No. VII.) and told him that his unfavourable opinions must be "of a _recent_ date." He denied this, carefully avoiding entering into any particulars, but went on with generalities, (No. VIII.) except as to "Press-marks, &c." which he declared to be the source of delay. In answer to this _recent_ accusation, I employed the very arguments and words which he himself had long before used in praise of this very system and arrangement. (No. IX.) His own words and arguments made him still more dissatisfied, and he vehemently condemned them. (No. X.) Upon which I sent him, enclosed in No. XI. a copy of his own letter of the 20th of October, 1837; and, as he had been taunting me with what he had printed and meant to print against me, I called on him to print along with it this letter. This he declined to do, (No. XII.) though, in the _Spectator_ of the 30th of May, he continued his attacks--not without some awkwardness, however, now that he knew the proof I had of what he had so indignantly denied, the _recent_ date of his unfavourable opinions.