follower of Blake; and Frederick, an excellent
topographical draughtsman, whose work in water-colour is represented at
the Victoria and Albert Museum, and who published a volume of
_Picturesque Views in Staffordshire and Shropshire_ (1830).

CALVERT, FREDERICK CRACE (1819-1873), English chemist, was born in
London on the 14th of November 1819. From about 1836 till 1846 he lived
in France, where, after a course of study at Paris, he became manager of
some chemical works, later acting as assistant to M.E. Chevreul. On his
return to England he settled in Manchester as a consulting chemist, and
was appointed professor of chemistry at the Royal Institution in that
city. Devoting himself almost entirely to industrial chemistry, he gave
much attention to the manufacture of coal-tar products, and particularly
carbolic acid, for the production of which he established large works in
Manchester in 1865. Besides contributing extensively to the English and
French scientific journals, he published a work on _Dyeing and
Calico-Printing._ He died in Manchester on the 24th of October 1873.

CALVERT, SIR HARRY, BART. (c. 1763-1826), British general, was probably
born early in 1763 at Hampton, near London. He was educated at Harrow,
and at the age of fifteen entered the army. In the following year he
served with his regiment in America, being present at the siege of
Charleston, and serving through the campaign of Lord Cornwallis which
ended with the surrender of Yorktown. From 1781 to 1783 he was a
prisoner of war. Returning to England in 1784, he next saw active
service in 1793-1794 in the Low Countries, where he was aide-de-camp to
the duke of York, and in 1795 was engaged on a confidential mission to
Brunswick and Berlin. In 1799, having already served as deputy adjutant
general, he was made adjutant general, holding the post till 1818. In
this capacity he effected many improvements in the organization and
discipline of the service. He greatly improved the administration of the
army medical and hospital department, introduced regimental schools,
developed the two existing military colleges (since united at
Sandhurst), and was largely responsible for the founding of the Duke of
York's school, Chelsea. In recognition of his work as adjutant general
he was made a G.C.B. (1815), and, on retiring from office, received a
baronetcy (1818). In 1820 he was made governor of Chelsea hospital. He
died on the 3rd of September 1826, at