[1] He later used his legal skills in the interests of friends, kinsmen and others, acting as trustee in the affairs of his brother, Anthony Carleton, his brother-in-law, Rowland Lytton, Sir Richard Knightley,[7][8] and James Blount, 6th Baron Mountjoy, who by 1566 was thousands of pounds in debt.
[3] He served in a military capacity on two occasions, in 1557 as a captain at the siege of St Quentin, and in 1573 as treasurer to the Earl of Essex's expedition to Ireland.
He inherited his father's property at Walton-on-Thames, and spent his early years there, but by 1568 had conveyed it to his younger brother, Edward.
[1][3] He also purchased extensive lands in Gloucestershire,[3] and during the later part of his life acquired substantial interests in former monastic properties in the fenlands, including some 1000 acres of marshland used for grazing, as well as a house in Wisbech and the manor of Coldham.
In 1571 they entered into a recognizance in the amount of £1000, and in 1576 Carleton was granted the stewardship of the manor of Wollaston in Northamptonshire, which he appears to have obtained for Cope's benefit.
In 1589 he married 'Mistress Crane', at whose country home at East Molesey in Surrey, across the river from Hampton Court Palace, the first of the Marprelate tracts, Martin's Epistle, was printed by Robert Waldegrave on a secret press in October 1588.
[11][2][12][13] After the printing of the Epistle, the press was moved to Fawsley in Northamptonshire, the home of Sir Richard Knightley, whom Collinson terms 'an enthusiast not entirely compos mentis, whose affairs were in Carleton's hands'.
Although the secret press was not captured by agents of Henry Stanley, 4th Earl of Derby, until August 1589, according to Carlson, as early as April 1589 Carleton had been ordered to appear before the Privy Council, and directed to attend daily until given permission to depart.