To my second paper on the Báabís in the J.R.A.S. for 1889 I added an Appendix (App. IV, pp. 1000–1008), wherein I briefly described some of the chief Bábí works of which I had obtained MSS. in Persia, arranging these according to their authorship and the date of their composition, where these could be determined. Of the MSS. themselves (some of which were of composite character) I gave no description. This I now regard as an error of judgement, since, for many reasons (and chiefly that in the future, when they shall pass into other hands, there may be no difficulty in identifying them), it is desirable that their contents should be clearly and succinctly stated. This defect in my previous work I now propose to remedy; but I should not perhaps have done so were it not that since the year 1889 I have acquired a considerable number of new MSS. from authentic sources, a description of which may facilitate the identification of Bábí MSS. in other collections. To each of these MSS. I shall now give a distinctive press-mark, which shall be inscribed on the title-page, and which shall serve for its future identification. The whole class I denote by the letters BB (the first B indicating that they are Bábí MSS., the second that they form part of my collection).