William Holden (7 April 1808 – 11 October 1897) was a journalist with the South Australian Register, noted for his breadth of knowledge and diverse interests, and remembered as the "Riddler" in The Observer.
Every week from 1868 to 1896 he produced for The Observer, the Register's sister publication, its "Puzzler" page to stretch and delight the minds of the brighter children and adults so inclined.
His views on art and music were respected, and he was considered a deeply religious and moral thinker, heavily influenced by his adherence to the New Church.
[3] He sustained a severe shaking one Sunday night in 1896 when he was knocked down by a horse-drawn carriage in the city whilst crossing from The Register office to catch the tramcar home.
He eventually recovered sufficiently to go out of doors, and though he never returned to his desk at The Register office, he insisted on contributing his literary work from his residence at North Adelaide.