I now offer a few words in explanation of the nature of these original documents. The late Baron Hume had collected together his uncle's papers, consisting of the letters addressed to him, the few drafts or copies he had left of letters written by himself, the letters addressed _by_ him to his immediate relations, and apparently all the papers in his handwriting, which had been left in the possession of the members of his family. To these the Baron seems to have been enabled to add the originals of many of the letters addressed by him to his intimate friends, Adam Smith, Blair, Mure, and others. The design with which this interesting collection was made, appears to have been that of preparing a work of a similar description to the present; and it is a misfortune to literature that this design was not accomplished. On the death of Baron Hume, it was found that he had left this mass of papers at the uncontrolled disposal of the Council of the Royal Society of Edinburgh. This learned body, after having fully considered the course proper to be adopted in these circumstances, determined that they would permit the papers to be made use of by any person desirous to apply them to a legitimate literary purpose, who might enjoy their confidence. Having for some time indulged in a project of writing a life of Hume, postponed from time to time, on account of the imperfect character of the materials at my disposal, I applied to the Council of the Royal Society for access to the Hume papers; and after having considered my application with that deliberation which their duty to the public as custodiers of these documents seemed to require, they acceded to my request. The ordinary form of returning thanks for the privilege of using papers in the possession of private parties, appears not to be applicable to this occasion; and I look on the concession of the Council as conferring on me an honour, which is felt to be all the greater, that it was bestowed in the conscientious discharge of a public duty.