The window dedicated to Sir Henry Mangles Denham is situated on the north side of the church. It depicts Jesus in the boat with three disciples calming the storm (Matthew chapter 8, verse 26). The dedication at the bottom of the window reads “To the Glory of God and in affectionate memory of Admiral Sir H Mangles Denham FRS who died July 3rd 1887 aged 86 and of Isabella his wife who died Sep 22 1865 aged 63. This window is dedicated by their daughter Emily E Mangles.”

Sir Henry is best known for his work as a hydrographer charting the waters of Shark Bay in Australia in 1858 in HMS Herald. The town of Denham in Australia, twinned with Denham in Buckinghamshire, derives its name from Captain Henry Mangles Denham. Captain Denham was knighted at Windsor Castle on 26 March 1867 and retired from the Royal Navy in August 1877. He lived in London.

The window beside it is dedicated to another of Sir Henry’s daughters (Alicia Eliza Parker) and a window in the sanctuary, above the altar, is dedicated to Captain William H Mangles—Emily’s husband. Captain Mangles (of the 50th Queens Own Regiment) who died at Clewer in 1868 aged 37 having succumbed to injuries received in the trenches before Sebastopol. Sir Henry is also the father of Annesley Turner Denham to whom a window on the south wall of All Saints, Frances Road, is dedicated by his widow.

Emily lived in Windsor and according to census records Annesley and his wife lived in Queens Terrace, Kings Road. Emily must have been a parishioner as she also gifted altar kneeling mats and alms bags, which she had worked.