Walker’s grandfather established the family fortune as a goldsmith in Elizabethan Exeter, and his father founded the grammar school. Walker himself, a strong Churchman, was returned for the city at both elections of 1640, the first of the family to sit. Disabled for royalism, he attended the Oxford Parliament. He signed the surrender of Exeter in 1646 and in accordance with its terms compounded at one-tenth for his delinquency with a fine of £889. He was regarded during the Interregnum as one of the royalist leaders in Exeter.3Keeler, 375-6; Trans. Devon Assoc. lxi. 210-11; HMC Exeter, 146; Cal. Comm. Comp. 1259; HMC Portland, i. 584.
Walker was ineligible at the general election of 1660, but he signed the declaration of the Devonshire Cavaliers disclaiming animosity towards their opponents. He regained his seat in 1661, but he was not an active Member of the Cavalier Parliament. He was appointed to only six committees, including those to hear a petition from the clothiers of Devon and to consider a bill regulating the manufacture of stuffs in the county. As a result of a petition from the merchant adventurers of Exeter in 1663, he was ordered to attend the King with an address calling for the rigid enforcement of the Navigation Act. The last order for payment of his parliamentary wages was entered in the corporation act book in September. He died on 23 Aug. 1673 in his 77th year, and was buried at St. Mary Arches. An inscription records that he was thrice elected to Parliament, and describes him as always faithful to his God, his church and his King.4Trans. Devon Assoc. lxviii. 108; CJ, viii. 522; Exeter corp. act bk. 10, ff. 158, 164; 11, f. 5; Creswell, 103.