Cage was an attorney, described by Sir Simonds D’Ewes† as of ‘reasonable abilities for a country gown man’.
Cage was first returned to Parliament at the Ipswich election of 27 Apr. 1614, which was caused by the decision of the previously elected Member, Sir Francis Bacon, to sit for Cambridge University. He appears only once in the surviving records of the Addled Parliament, on 24 May, when he was named to the committee for the bill for limitation of actions and avoidance of lawsuits.
Cage was re-elected for the borough to every Parliament summoned in his lifetime. In the third Jacobean Parliament he was one of a dozen Members added to the committee for privileges on 8 Feb. 1621.
On 19 Mar. Cage drew the attention of the Commons to ‘strange impositions’ put upon shipbuilders by the new Shipwrights’ Company, based in the suburbs of London, but with jurisdiction over the whole kingdom. The issue was referred to the committee of grievances and the following day the Company was ordered to cease exacting money until the legality of its patent had been established. The same day the master of the Company wrote to the Navy commissioner, John Coke*, complaining that Ipswich shipowners had preferred a bill to dissolve the Company. There is no trace of such a measure in the parliamentary records, however, and the patent was never reported from the grievances committee.
Cage worked closely with his fellow Ipswich member, Robert Snelling. Indeed one speech, at the second reading of the bill ‘for avoiding the return of insufficient jurors’ on 19 Apr., is attributed to Cage in the Journal, but to Snelling in the diary of Sir Thomas Barrington*. The subject matter suggests that the lawyer Cage is more likely to have been the speaker. Amendment, he said, would be necessary for such counties as Suffolk, which for historical reasons had four sessions towns. It was also desirable that the sheriff should include ‘copyholders of good value’ and freeholders qualified by lands in another county.
Cage followed up Snelling’s campaign against the lighthouse patents by speaking in favour of the seamarks bill, promoted by the Trinity House of Deptford, on 7 May. Seeking to rebut the charge that the bill would endow Trinity House with a monopoly as grievous as the lighthouse patentees, he asserted that ‘we regard not the Trinity [House] men but impose it on them because no body politic so fit, nor any will take it on those terms’.
In 1624 Cage received nine committee appointments, and made two speeches. He was again confused with Snelling on 23 Feb., when one observer recorded that he preferred a bill for the observance of the Sabbath; both the Journal and other diarists ascribe this action to Snelling.
When the first Parliament of the new reign met, Cage urged his fellow Members first to agree a day of fasting and humiliation among themselves, and then to petition the king for a nationwide fast (21 June 1625).
Owing to Snelling’s ill health, the representation of Ipswich in the second Caroline Parliament devolved entirely on Cage. Named to 12 committees, including the committee for privileges (9 Feb. 1626), he was sent on 15 Feb., along with the solicitor general, Sir Richard Shilton and John Pym, to ask the attorney-general (Robert Heath*) for the bill concerning the education of recusants’ children, which the latter had presumably drafted.
Cage’s principal concern in this Parliament was the state of the Navy. On 6 Mar. he complained ‘there is no fleet at sea to defend the coasts’ and, 12 days later, that ‘three hundred ships at Newcastle dare not stir’ for fear of the Dunkirk privateers.
Snelling died in 1627, leaving Cage not only the dominant figure in Ipswich politics but also increasingly influential at county level. Writing to D’Ewes on 15 Apr., Sir William Spring stated that Cage ‘sure can sway’ Ipswich and had ‘propounded’ that Sir John Rous I* should stand for the county after Sir Edward Coke plumped for Buckinghamshire.
Cage is not known to have spoken again in the House until 17 May, when he successfully moved for the impositions on Newcastle coal to be referred to the grievances committee.
Cage remained concerned by the impact of the war on shipping. On 6 June he told the House that five Ipswich ships, worth over £40,000, had been taken returning from the Baltic. The following day he complained that in the previous year his constituency had lost 38 ships and that naval warships had arrived too late to be of use. Four days later he was among those instructed to collect certificates of losses from Trinity House and other interested parties.
At the examination of Richard Burgess, the anti-puritan vicar of Witney, on 26 May, Cage accused Burgess of threatening those who denounced him with High Commission.
In the second session Cage, along with his colleague Edmund Day, was added to the committee to examine the information of John Rolle*, the London merchant whose goods had been seized for failing to pay Tunnage and Poundage (3 Feb. 1629). He was also appointed to four other committees. He made no recorded speeches. His notes of the turbulent closing scenes of the session were consulted in the Short Parliament but are no longer extant.
Cage was considered the ringleader of the Ipswich riot of 1636 against the amalgamation of small benefices.
