There they were blockaded until 14 April, when a British force under Major-General Frederick Maitland and Captain Philip Beaver in Acasta, invaded and captured the islands.

[Note 3] In 1810, Ethalion briefly paid off, before returning to service in 1811 off Lisbon under Captain Heywood and then in the Baltic Sea.

[7] Shortly after the outbreak of the War of 1812, on 12 August, Ethalion shared in the seizure of several American vessels: Cuba, Caliban, Edward, Galen, Halcyon, and Cygnet.

[Note 4] Ethalion escorted a convoy from the St Lawrence River on 12 November 1813, but bad weather dispersed the vessels.

[9][Note 5] In 1814 Ethalion was operating under Captain William Hugh Dobbie off the Irish Coast and in 1816 was placed in reserve at Woolwich.