His obituary in the East Dorset Herald, 26th May 1910 includes further information as follows:-
".... It was an engagement between Her Majesty's ship the Shah on which Mr. Marshall was then serving, and the Peruvian ironclad the Huascar. The Shah was the flagship of Rear Admiral de Horsey, and though a new vessel, was of iron, sheathed with wood, a fine ship of the old style, and the Huascar was an ironclad of a much more powerful description. There had been a revolution in Peru, and the Peruvian Navy had rebelled, and the Huascar had gone on a piratical expedition, stopping British mail boats, taking coals and other things out of them. This caused an intervention on the part of the British Government, and the Shah was sent in pursuit of the Huascar. The fight which took place was inconclusive. Although the Huascar was not captured, the Shah had the best of the battle, but her foe got away through getting into shallow waters, being of lighter draft. During the night the Shah sent a boating expedition to clear the Huascar out, but she got way and afterwards surrendered to her own government. As the result of that engagement the Admiralty quickly replaced the Shah with the more powerful ship Triumph, the Shah being ordered home. On her way she called at St. Helena, and there the news was received of the disaster to the 'noble 24th' of Isandulana (sic) fame. There was no cable to St. Helena and the Cape in those days, and upon his own responsibility the Captain of the Shah embarked all the available troops on the island, and proceeded with them to Port Elizabeth, from whence the troops and Naval Brigade of 600 strong went to the front, and their timely arrival practically saved the situation, keeping the zulus in check until the military expedition arrived."