Alcock’s grandfather William Alcock (d. 1764) was one of the Alcocks of Sibertoft, Northamptonshire. He lived at Ravenstone, near Ashby-de-la-Zouche in Leicestershire, where in December 1754 he married Mary, the daughter of John Mawbey (d. 1754). Her brothers John Mawbey (d. 1786), who sold Alcock his family’s Ravenstone property, and Joseph Mawbey† (1730-98), were partners in a lucrative vinegar distillery at Vauxhall in south London. Joseph Mawbey, who was awarded a baronetcy by the Rockingham ministry in 1765, was appointed administrator that year of William Alcock’s estate. Assisting Alcock’s sons, one of whom died young, he procured a clerkship at the treasury for the eldest, this Member’s father Joseph, who rose to senior clerk (1785-98), chief clerk (1798-9), chief clerk of the revenue (1799-1821) and auditor (1815-21), and a military commission for Thomas Alcock (d. 1856), who served with distinction in the Bengal army, married Caroline St. Leger, daughter of the 1st Viscount Doneraile, and was treasurer of the ordnance, 1810-18; but little can be stated with certainty about the third son John Alcock, who trained as a lawyer.
At the general election of 1826 Alcock came in unopposed for Newton on the Legh interest. He did not apparently speak in debate, but he divided against Catholic relief, 6 Mar., and with the Liverpool government for the duke of Clarence’s annuity, 16 Mar. 1827. He voted in the protectionist minority against the corn bill, 2 Apr., and the Tory minority against the Coventry magistracy bill, 18 June 1827. He divided against repealing the Test Acts, 26 Feb., and Catholic relief, 12 May, for the usury laws amendment bill, 19 June, and in the Wellington ministry’s majority on the ordnance estimates, 4 July 1828. Soon afterwards he went on an 18-month tour of Russia, Persia, Turkey and Greece (described in his Travels, privately printed in 1831) and so was absent from Parliament when Catholic emancipation was conceded in 1829. He divided for Jewish emancipation, 5 Apr. 1830, and left the House at the dissolution that year.
Alcock’s political views subsequently changed, for it was as a Liberal that he came in for Ludlow in 1839 after standing unsuccessfully there two years earlier. Unseated afterwards for bribery, he retained properties in the borough until at least 1847.
