2. Half-length, said (but evidently erroneously) to have been painted by Sir Joshua Reynolds. Now in the meeting-room of the Royal Society of Musicians, Lisle Street, Soho. 3. Half-length, originally used as a sign at the tavern known by the name of "The Purcell's Head," in Wych Street, Strand. Query, where is it at present? 4. Portrait of Purcell when a very young man, formerly among Cartwright's pictures in Dulwich College. Query, what has become of it? 5. An original portrait by Closterman. In his hand is a miniature of Queen Mary. Formerly in the collection of Charles Burney, Mus. Doc., at whose sale it was sold, in 1814, for 18_l._ 18_s._ I cannot trace this picture. 6. Crayon drawing, by Sir Godfrey Kneller, from the first-mentioned painting. Formerly in Mr. Bartleman's collection. _Engravings._ 1. An engraving by T. Cross, prefixed as frontispiece to his _Twelve Sonatas_, 1683. 2. Ditto, by R. White, from a painting by Closterman. Frontispiece to the _Orpheus Britannicus_. 3. Ditto, engraved by W. N. Gardiner, from a drawing by S. Harding, taken from the original picture in Dulwich College, 1794. 4. Ditto, by T. Holloway, from the crayon drawing by Sir Godfrey Kneller. 5. An etching inscribed "Henry Purcell," but without the name of painter or engraver. 6. A small engraving, by Grignion, in Sir John Hawkins's _History of Music_. 7. An engraving by W. Humphries, after Sir Godfrey Kneller. Frontispiece to Novello's edit. of Purcell's _Sacred Music_. EDWARD F. RIMBAULT. QUERY ON THE CONTROVERSY ABOUT FLUXIONS. In the report made by the Committee of the Royal Society, it is stated that the Committee had "consulted the Letters and Letter-books in the custody of the Royal Society, and those found among the Papers of Mr. _John Collins_....;" thus leaving it doubtful whether Collins's papers _then_ belonged to the Society, or, it may be, meaning to distinguish them as not so belonging. In the preface to the _Analysis per Quantitatum Series_ ... by William Jones (father of his more celebrated namesake), London, 1711, 4to., which contains some of the matter published in 1712 in the _Commercium Epistolicum_, occurs the following passage:-- "Etenim secundus jam agitur annus ex quo Scrinia _D. Collinsii_ (qui, uti notum est, amplissimum cum sui sæculi Mathematicis commercium habuit) meas in manus inciderint; et in illis plurima reperi à cunctis fere totius _Europæ_ eruditis ipsi communicata; et inter ea non pauca, quæ a Viro Cl. D. _Newtono_ scripta fuerint."