Early years

In 1827, his mother Frances Trollope moved to America with Trollope's three younger siblings, to Nashoba Commune. After that failed, she opened a bazaar in Cincinnati, which proved unsuccessful. Thomas Trollope joined them for a short time before returning to the farm at Harrow, but Anthony stayed in England throughout. His mother returned in 1831 and rapidly made a name for herself as a writer, soon earning a good income. His father's affairs, however, went from bad to worse. He gave up his legal practice entirely and failed to make enough income from farming to pay rents to his landlord, Lord Northwick. In 1834, he fled to Belgium to avoid arrest for debt. The whole family moved to a house near Bruges, where they lived entirely on Frances's earnings.

According to Trollope, "the first seven years of my official life were neither creditable to myself nor useful to the public service." At the Post Office, he acquired a reputation for unpunctuality and insubordination. A debt of £12 to a tailor fell into the hands of a moneylender and grew to over £200; the lender regularly visited Trollope at his work to demand payments. Trollope hated his work, but saw no alternative and lived in constant fear of dismissal.In 1841, an opportunity to escape offered itself. A postal surveyor's clerk in central Ireland was reported as being incompetent and in need of replacement. The position was not regarded as a desirable one at all; but Trollope, in debt and in trouble at his office, volunteered for it; and his supervisor, William Maberly, eager to be rid of him, appointed him to the position.

Trollope based himself in Banagher, King's County, with his work consisting largely of inspection tours in Connaught. Although he had arrived with a bad reference from London, his new supervisor resolved to judge him on his merits; by Trollope's account, within a year he had the reputation of a valuable public servant. His salary and travel allowance went much further in Ireland than they had in London, and he found himself enjoying a measure of prosperity. He took up fox hunting, which he pursued enthusiastically for the next three decades. His professional role as a post-office surveyor brought him into contact with Irish people, and he found them pleasant company: "The Irish people did not murder me, nor did they even break my head. I soon found them to be good-humoured, clever—the working classes very much more intelligent than those of England—economical and hospitable."

At the watering place of Kingstown, Trollope met Rose Heseltine,the daughter of a Rotherham bank manager.They became engaged when he had been in Ireland for a year; because of Trollope's debts and her lack of a fortune, they were unable to marry until 1844. Soon after their marriage, Trollope transferred to another postal district in the south of Ireland, and the family moved to Clonmel