D'Arcy is believed to have been first educated in one of the schools operating in the town in the early 17th century, but he was not admitted into the
King's Inns in Dublin, so he had studied in London, being admitted as a student of the
Middle Temple, London, on 21 July 1617. D'Arcy appears to have spent fully five years at the Temple, and began working about 1622. He was engaged by Richard Burke, 4th
Earl of Clanricarde, who was the most powerful landowner in
Connacht. D'Arcy's stepfather,
Sir Henry Lynch, 1st Baronet, was Burke's business agent. D'Arcy is said to have become active on the Connacht circuit about 1627, having joined the King's Inn in June 1628. This coincided with the proclamation on 26 June permitting lawyers to practise at the bar by taking the
Oath of Allegiance instead of the
Oath of Supremacy. As the latter had been inimical to Catholics such as D'Arcy, the proclamation now enabled them to practise freely. As
Charles I was constantly short of money, he needed to find new sources of income. One was to allow the richer Irish Catholics to pay for legal equality, known as
"The Graces". Another proposal was to sell land in Ireland to English subjects by checking and sometimes rejecting existing legal titles to land. This led to D'Arcy's involvement in politics, as he, Clanricarde,
Richard Martyn and their generation tried to solve "a more complex political" problem. Writing in 1984, Liam O'Malley put it as follows:How could the
Old English Catholics create a political structure in which they could have sufficient influence to safeguard their interests in the face of a Dublin administration appointed by a Protestant, and often hostile, English government? ... They felt constantly threatened by an intolerant Protestant administration and a hostile
Established Church. Their position was being gradually undermined by
confiscation of Irish lands and the steady build-up on the Protestant population of English and Scottish settlers ... Darcy had to cope with these difficulties in the course of his political career. By using their influence both in Dublin and London, led by the Earl of Clanricarde, the landowners of Connacht did what they could to prevent confiscation.
Lord Deputy Thomas Wentworth, 1st Earl of Strafford called for a parliament to meet at Dublin in July 1634; D'Arcy having already been returned as
member of parliament for
Navan, Richard Martyn for
Athenry. Others in attendance included Sir Henry Lynch and Dominick Browne, along with other Galwegians. However, Wentworth ensured that a Protestant-majority jury was returned, and from there cleared the ground for the confiscations to take place. By June 1635 preparations were in earnest, and inquisitions were to be held in
Boyle,
Mayo,
Sligo and
Portumna for juries to find the King's Title to the lands concerned and thus give a legal fiction to the proceedings. However, the jury of Galway found against the King, leading them to be imprisoned and D'Arcy to be fined 1,000 pounds. To combat this, D'Arcy, Martyn, and Sir Roger O'Shaughnessy travelled to London to present a petition on behalf of the Connacht landowners at court. As Wentworth considered the refusal of the Galway jury had put the entire plantation scheme in jeopardy, he did much to frustrate their efforts. Ultimately, all three returned to Ireland by May 1635, their mission a failure. Along with the Galway jury, they were tried, censured 400 livres each, and convicted. D'Arcy and Martyn refused to take the Oath of Supremacy and were instantly disbarred. D'Arcy's brother, Sheriff Martin D'Arcy, had been the head of the jury, and died in prison in June after ill-treatment. The jury submitted in December 1636. Yet Connacht plantation did not go ahead. Wentworth over-reached himself, and English political issues led to him being recalled in 1639. D'Arcy was again elected to the
Irish House of Commons in 1641 and it was there that his reputation reached another level. ==D'Arcy's
Argument==