 Cockburn also had a detachment of 180 seamen and 200 marines from the squadron's naval brigade, together with a small detachment of the Royal Artillery from Bermuda and under the command of Lieutenant Robertson.On 28 April, when Cockburn learned of stores of flour and military equipment at French Town on the Elk River, he embarked in "Fantome" and took "Mohawk", "Dolphin", "Racer" and "Highflyer" up the river.At 11 p.m. 150 marines and five artillery men left in boats to destroy the stores, with Lieutenant Lewis following in "Highflyer" as support.