Sir Robert Cotton began developing the works and manuscripts into a collection for his Library shortly after the birth of his son in 1594. From the period 1609 to 1614 the deaths of various people (including Lord Lumley, Earl of Salisbury, Prince Henry, William Dethick and Northampton) all contributed to Sir Robert Cotton's purchase of works for his library. Sir Robert Cotton resided in London, while his wife and son remained in the country. During his father's absence Thomas Cotton studied to eventually receive his BA on 24 October 1616 from Broadgates Hall—the very same year that Sir Robert Cotton returned to his wife Elizabeth and family (a result of a hiccup with the law involving the death of earl of Somerset). At that point, Sir Thomas Cotton had taken the responsibilities of the home and the library into his own hands.