Roderick Maclean

Roderick Edward Maclean (c. 1854 – 8 June 1921) was a Scotsman who attempted to assassinate Queen Victoria on 2 March 1882, at Windsor, England, with a pistol. This was the last of eight attempts by separate people to kill or assault Victoria over a period of four decades. Maclean's motive was purportedly a curt reply to some poetry that he had mailed to the Queen.

Other accounts state that the revolver was a toy and that his aim was disrupted by an Eton schoolboy:

At his trial, Dr. Charles Vernon Hitchins testified that MacLean had been certified insane in June 1880, two years before the attempted assassination, and he had been sent to Somerset Lunatic Asylum. He was living at 14 Wadham Street in Weston-super-Mare. Dr. Hitchins stated that Maclean was complaining of headaches and believed that all the people in England are against him, and he felt he must injure someone because they are conspiring to deceive him. He had also sent letters to his sister in 1880, Caroline Maclean, stating that, "If I cannot commit a murder one way, I will another way, and all can add is, if there is more difficulty, there may be more victims." Multiple doctors also testified that Maclean was insane and "did not believe he was capable of appreciating the nature or quality of any act which he might commit."

Tried for high treason on 20 April, Maclean was found "not guilty, but insane" by a jury after five minutes' deliberation, overseen by Lord Chief Justice Coleridge, and he lived out his remaining days in Broadmoor Asylum. The verdict prompted the Queen to ask for a change in English law so that those implicated in cases with similar outcomes would be considered as "guilty, but insane"; this led to the Trial of Lunatics Act 1883.

A poem was later written about Maclean's attempt on the Queen's life by William Topaz McGonagall.