He served in the Royal Navy and achieved the rank of Captain .
Blackett was the eldest surviving son of Sir Edward Blackett , 2nd Baronet , and his wife Mary , daughter of Sir John Yorke .
Blackett served in the Royal Navy and achieved the rank of Captain .
Blackett was the eldest surviving son of Sir Edward Blackett , 2nd Baronet , and his wife Mary , daughter of Sir John Yorke .