sentences:  In 1827, Captain James Stirling sighted the area surrounding the Swan River as being suitable for agriculture, and upon his return to England in July 1828, lobbied for the establishment of a free settler colony, unlike the penal settlements of eastern Australia.The British Government assented, and a fleet led by Charles Fremantle, aboard HMS "Challenger" returned along with two other vessels, "Parmelia" and "HMS Sulphur", including a detachment of the 63rd Regiment of Foot, arriving to establish the Swan River Colony in 1829.In 1831, the 1st/39th Regiment left King George Sound.