Background
Maclear was born on March 17, 1794, in Newtownstewart, Northern Ireland, the eldest son of James Maclear and Mary Magrath.
1860
Maclear, on the receipt of his knighthood
Maclear was born on March 17, 1794, in Newtownstewart, Northern Ireland, the eldest son of James Maclear and Mary Magrath.
Defying his father’s wish that he become a clergyman, Maclear studied medicine at Guy’s and St. Thomas’s hospitals in London.
In 1815 Maclear joined the staff of Bedford Infirmary, where his interest in astronomy was aroused by his friendship with Admiral William Henry Smyth. From 1823 he practiced medicine in Biggleswade, Bedfordshire, where he set up a small observatory in his garden; he was lent the Wollaston telescope by the Royal Astronomical Society to observe occupations of Aldeharan which he had himself calculated. In 1833 he was appointed Her Majesty’s astronomer at the Cape of Good Hope, where he arrived on 5 January 1834, shortly before John Herschel.
Until his retirement, Maclear devoted himself to the work of the observatory and to matters of public welfare in the colony. From 1837 to 1847 he carried out the re-measurement and extension of Lacaille’s arc as a basis for the survey of the colony, and this earned him the Lalande Prize in 1867 and a Royal Medal in 1869. In 1839-1840 and 1842-1848 he observed a Centauri to confirm the parallax derived by Thomas Henderson.
Maclear also promoted a wide range of applied sciences in the colony. He assembled meteorological, magnetic, and tidal data, and in 1860 he established time signals for Port Elizabeth and Simonstown. He sponsored the construction of lighthouses, promoted sanitary improvements, and took part in a commission on weights and measures. He was keenly interested in African exploration and was a friend of Livingstone and Stanley.
Maclear was knighted in 1860. He retired in 1870 and went blind in 1876, but he continued to interest himself in public affairs at the Cape until his death.
In 1825 Maclear married Mary Pearse, the daughter of Theed Pearse, Clerk of the Peace for the county of Bedford.