Captain Harry Willes Darell de Windt (9 April 1856, Paris - 30 November 1933, Bournemouth) was the aide-de-camp to his brother-in-law Charles Brooke, Rajah of Sarawak (Harry's sister Margaret was Brooke's wife), and is best known as an explorer and travel writer.
Although he recognized the necessity for the government taking measures with the object of regulating its attitude towards the Church, and declared himself prepared in his official capacity to carry out the May Laws, his confirmation was refused by the administration on 8 May 1875, a measure which resulted in an interpellation by Windt-Lorst in the Reichstag and the Prussian Diet.