Cecil was provided with a lengthy education, including several years of travels abroad. His father held the liberty of Peterborough, and doubtless secured Cecil’s election for the borough in 1604.
At the general election of 1614 Cecil was returned for the family borough of Stamford, four miles from Collyweston.
As heir to his nephew Lord Roos, who died in Naples in 1618, Cecil partitioned the estates with the 6th earl of Rutland, increasing his income by £600 p.a. This included the manor and advowson of Wakerley, seven miles from Stamford, where he took up residence, though ‘having occasion to be much from thence’, and he employed many servants and workmen in the gardens and demesnes.
