Morrison’s grandfather acquired the ex-monastic property of Cassiobury in 1545.
Morrison stood for the Hertfordshire at the general election in 1620, and having obtained the support of the 2nd earl of Salisbury (William Cecil*), was returned as the junior knight of the shire.
Morrison was re-elected for Hertfordshire in 1624, again with Salisbury’s backing,
Morrison’s stance against purveyance may account for his removal from the lieutenancy at about this time, although he continued to hold other local offices. In the elections to the first Caroline Parliament he was returned on Salisbury’s nomination for St. Albans, seven miles from Cassiobury.
Morrison may have hoped to sit again for St. Albans; there is no evidence of a contest, but he was unsuccessful at the general election in 1628. He therefore put himself forward a few weeks later when the elevation of Sir Edward Howard II to the peerage created a vacancy at Hertford, and after a short delay Morrison was returned at the by-election, presumably with Salisbury’s support.
Morrison died on 20 Aug. during the recess, leaving strict instructions to his ‘dear and best deserving wife’ to forbid a funeral service. This was not for motives of economy, for in his will dated 21 Feb. 1628 he bequeathed £50 to the poor of Watford and £400 to his household servants. He left his nephew the 4th earl of Bedford (Sir Francis Russell*) £50 ‘to buy him a horse’, with a request to continue his friendship to the family, £40 to his father-in-law for the same purpose, and £20 to his cousin Edward Alford* for a mere nag, ‘ever acknowledging his faithful love to me and mine’. His widow buried him, in accordance with his instructions, in the north aisle of Watford church, and provided a monument to his memory at a cost of £400 in tribute to 21 years of married life ‘without quarrel or cloud’.
