Devonshire House (Bishopsgate St.) -- Home of Sir William Cavendish, 3rd Earl of Devonshire, who rarely attended the House of Lords.
His heir, William, Lord Cavendish MP married on 26 Oct. 1662, Lady Mary Butler (d. 31 July 1710), daughter of James Butler, 1st Duke of Ormonde. They had 3 sons and 1 daughter.
I'm guessing Lord Cavendish MP was staying at Devonshire House in 1667 because in 1668 the Earl built another house for him which is now known as "Old Devonshire House". Wikipedia isn't helpful because it only starts its history of the mansions known as Devonshire House with "Old Devonshire House". https://en.wikipedia.org/wiki/Old_Devonshire_House
But Sir William, Lord Cavendish MP I's (c.1590-1628) Parliamentary page confirms that he lived at Chatsworth, Derbys. and an older Devonshire House of St. Botolph Bishopsgate, London.