Thomas Preston, a son of the fourth Viscount Gormanston, was fifty-six years old when the Irish rebellion broke out. He was a captain in the same regiment as Owen Roe O'Neill in 1607, but was never on good terms with him. They were rivals in recruiting during the reign of Strafford, who favoured the man of English descent as far as he could. In 1635 Preston distinguished himself in the defence of Louvain against the combined forces of France and Holland, and in 1641 in the defence of Genappe against Frederick Henry of Orange. In 1642 his nephew, Lord Gormanston, urged him to return to Ireland. In March of that year Mountgarret sent Geoffrey Barron, Wadding's nephew, to Paris, and in July he met Preston there. Richelieu, who had not forgotten Rochelle, did not declare himself openly, but he discharged all the Irish soldiers in the French service, allowed war material to be purchased in France, and let it be understood that help would be forthcoming to the extent of a million of crowns. Preston sailed from Dunkirk, accompanied by several officers, and arrived in Wexford harbour at the beginning of August. Here he was joined by at least a dozen vessels laden with war material from St. Malo, Nantes, and Rochelle. He reconnoitred Duncannon fort, which he thought could be taken in fifteen days, and then went to Kilkenny, where the confederates were still assembled. Public opinion quickly designated him as the fittest person to have military command in Leinster, and Mountgarret, who was no soldier, was very willing to yield the place to him.[18] [Sidenote: Limerick Castle taken, June 1642.] [Sidenote: Death of St. Leger. Inchiquin vice-president, June 1642.] [Sidenote: Battle of Liscarrol, Sept. 1642.]