VII. DUNCAN FARQUHARSON GREGORY (1813-1844), brother of the preceding, was born on the 13th of April 1813. After studying at the university of Edinburgh he in 1833 entered Trinity College, Cambridge, where he was for a time assistant professor of chemistry, but he devoted his attention chiefly to mathematics. He died on the 23rd of February 1844. The _Cambridge Mathematical Journal_ was originated, and for some time edited, by him; and he also published a _Collection of Examples of Processes in the Differential and Integral Calculus_ (1841). A _Treatise on the Application of Analysis to Solid Geometry_, which he left unfinished, was completed by W. Walton, and published posthumously in 1846. His _Mathematical Writings_, edited by W. Walton, with a biographical memoir by Robert Leslie Ellis, appeared in 1865. FOOTNOTE: [1] See A. G. Stewart, _The Academic Gregories_. GREGORY, EDWARD JOHN (1850-1909), British painter, born at Southampton, began work at the age of fifteen in the engineer's drawing office of the Peninsular and Oriental Company. Afterwards he studied at South Kensington, and about 1871 entered on a successful career as an illustrator and as an admirable painter in oil and water colour. He was elected associate of the Royal Academy in 1883, academician in 1898, and president of the Royal Institute of Painters in Water Colours in 1898. His work is distinguished by remarkable technical qualities, by exceptional firmness and decision of draughtsmanship and by unusual certainty of handling. His "Marooned," a water colour, is in the National Gallery of British Art. Many of his pictures were shown at Burlington House at the winter exhibition of 1909-1910 after his death in June 1909. GREGORY, OLINTHUS GILBERT (1774-1841), English mathematician, was born on the 29th of January 1774 at Yaxley in Huntingdonshire. Having been educated by Richard Weston, a Leicester botanist, he published in 1793 a treatise, Lessons _Astronomical and Philosophical_. Having settled at Cambridge in 1796, Gregory first acted as sub-editor on the _Cambridge Intelligencer_, and then opened a bookseller's shop. In 1802 he obtained an appointment as mathematical master at Woolwich through the influence of Charles Hutton, to whose notice he had been brought by a manuscript on the "Use of the Sliding Rule"; and when Hutton resigned in 1807 Gregory succeeded him in the professorship. Failing health obliged him to retire in 1838, and he died at Woolwich on the 2nd of February 1841.