Lady Adelaide Cadogan (née Paget; 1820–1890) was a British noblewoman and prodigious author, most noted for her seminal work on plays and card games. She used her title in her publications and that is how she is generally styled.
Lady Adelaide's Illustrated Games of Patience is believed to be the first-ever compendium on patience games. Originally published around 1870, it ran through many editions and is still reprinted today. In England, a 'Cadogan' has come to be used as a term for any book on patience games.[3]