The Lady Nelson sailed to execute this mission on April 3rd. On the evening of the following day she sighted Jervis Bay and, shortly after entering it, a strange vessel was perceived at anchor at the north-west end of the bay. No sooner did the stranger see the Lady Nelson approaching than she hurriedly weighed, and attempted to leave the bay. The attempt was frustrated, however, by Lieutenant Symons, who made sail after her and fired a gun to bring her to. Seeing that flight was useless, the schooner hoisted a St. George's Jack, and eventually came to under the lee of the Lady Nelson. The commander, finding that she was the Harrington's prize, went on board her, hauled down the English colours, and in their place hoisted the Spanish flag. She was in charge of Mr. William Tozer, one of the Harrington's men, from whom Lieutenant Symons received the log-book and charts. The second mate of the Lady Nelson and three of her crew were placed in the Estramina, and she left Jervis Bay for Sydney in company with the Lady Nelson. On the arrival of the vessels in the Cove on the afternoon of April 10th, Governor King and the Judge Advocate went on board the Spanish ship to take Mr. Tozer's depositions. As a result of this visit, orders were given that the schooner was to be detained at Sydney "for and on behalf of the Spanish sovereign." At the same time Governor King declared that if it were proved hostilities had already broken out when the seizure of the Estramina took place, the ship would become the property of the Admiralty, because the Harrington possessed no letters of marque. The Governor also made known his intention of detaining the Harrington at the first opportunity so that she might "answer for the event." The prize, which is described as a beautiful schooner, was never released and eventually became the property of the Government. The Lady Nelson remained in Sydney Cove from April 10th until May 7th, and during her stay she was freshly painted. On the latter date, on the arrival of the Buffalo, she weighed anchor and sailed down the harbour, coming to below Garden Island. She returned again to the Cove on the 10th and then prepared to take salt and brine on board for Norfolk Island. These were needed by the settlers for curing their bacon. The brig sailed on June 2nd and, as usual, discharging the cargo at the island proved a difficult task. Before he could land all his stores, Symons was forced to stand on and off shore for several days. He finally left on July 7th in company with the Governor King for Sydney. A cargo of wheat from the Greenhills, and a cargo of coals, cedar logs and spars from Newcastle, both of which were brought to Sydney for consumption there, kept the Lady Nelson busily employed until September 27th, when she again cleared the harbour with settlers and stores for Port Dalrymple.