Researching Percy Toplis

In 1978 a book was published which claimed that he had a large part in the Étaples Mutiny from 9–12 September 1917, as "The Monocled Mutineer". The authors suggested that he was pursued by the political establishment in a vendetta and may have been innocent of the murder. The book was dramatised by the BBC in 1986 as The Monocled Mutineer, creating considerable controversy.

Critics say that there is no evidence he was present and that official records show that Toplis's unit was en route to India during the Étaples mutiny. However, the official records that are often cited to refute claims that Toplis took part in the Mutiny have been extrapolated from a summary of his movements that appear in a letter addressed to the Chief Constable of Hampshire Police from Superintendent James L. Cox. The letter, dated 17 May 1920, describes how Toplis was deployed to the Dardanelles after the outset of war in 1915 with a Field Ambulance Company, was wounded and sent home and "then went on trooping duty to Salonika, Egypt and back to the Depot and then to India in the Troopship 'Orontes'”. However, the letter from Superintendent Cox makes no mention of a 'wanted notice' that featured in the Police Gazette dated 18 October 1918 which states that Toplis deserted from Salonika on 15 June that same year. The six-month 'hard labour' sentence served on him by the Nottingham magistrate in December 1918 suggests Toplis did not see out his service days in Egypt or Bombay as some have alleged. As Toplis's British Army Service Records have not been retained by the MOD, precise details about his movements remain unclear. With the exception of Cox's letter and a Medal Card, no other official records of his service history exist. Despite the omission of actual dates in Superintendent Cox's summary of his movements during the war, many historians feel it is unlikely that Toplis was in France to participate in the mutiny.