He then worked for a time with Sir John Vanbrugh, assisting him on the building Blenheim Palace for John Churchill, 1st Duke of Marlborough, where he took charge from 1705, after Vanbrugh's final break with the demanding Duchess of Marlborough, and Castle Howard for Charles Howard, later the 3rd Earl of Carlisle. In July 1721, John Vanbrugh made Hawksmoor his deputy as Comptroller of the Works. There is no doubt that Hawksmoor brought to the brilliant amateur the professional grounding he had received from Wren, but it is also arguable that Wren's architectural development was from the persuasion of his formal pupil, Hawksmoor.
he then worked for a time with sir john vanbrugh assisting him on the building blenheim palace for john churchill 1st duke of marlborough where he took charge from 1705 after vanbrugh's final break with the demanding duchess of marlborough and castle howard for charles howard later the 3rd earl of carlisle in july 1721 john vanbrugh made hawksmoor his deputy as comptroller of the works there is no doubt that hawksmoor brought to the brilliant amateur the professional grounding he had received from wren but it is also arguable that wren's architectural development was from the persuasion of his formal pupil hawksmoor