William was the only son of the London alderman of the same name. When his father died in 1434, he was still a minor and was entrusted to the care of his father’s friend and executor, Henry Barton†. It is not clear what happened to him when Barton died the following year.
Instead of following in his father’s trade as a draper, Cromer established himself at the family’s recently-acquired estate in and near Sittingbourne in Kent. These lands provided him with a substantial income and in the parliamentary subsidy assessed a year after his father’s death they were valued at over £30 p.a.
Cromer’s rise to prominence, by virtue of his marriage to Fiennes’s daughter, was rapid and extraordinary. On 6 Nov. 1444, probably aged only 22, he was pricked sheriff of Kent. In January the following year he presided over the parliamentary elections which saw his father-in-law returned as one of the knights of the shire. No indenture survives, but the return was part of a pattern that saw the parliamentary elections dominated by a small circle of men connected with Fiennes. Further evidence of how Cromer was able to use his courtly connexions during his first shrievalty came in September 1445 when he was pardoned for the escape of 11 prisoners from Canterbury gaol the previous month. The King’s writ ordering the letters of pardon, sealed with his signet at Windsor, recalled how ‘the said Crowmer is a persoune whome we have in tendrenesse and chierte and is also as ye knowe wel towardes oure right trusty and welbeloved knight Sir James ffenys Chamberlain unto oure moost dere and bestbeloved wif the Quene’.
On 2 Jan. 1447 at Rochester Cromer was himself elected as one of the knights of the shire for the Parliament at Bury St. Edmunds alongside his father-in-law. The election was presided over by another of Fiennes’s associates, William Isle*, but the list of attestors included erstwhile rivals of Cromer and Fiennes, such as Humphrey Eveas, as well as their associates, Stephen Slegge and Robert Est. Cromer’s activities at the Parliament, which saw the arrest and death of Humphrey, duke of Gloucester, and the elevation of Fiennes to the dignity of Lord Saye and Sele, are not recorded. But whether or not Cromer was personally involved in Gloucester’s demise, he certainly benefited from it. Shortly after Duke Humphrey’s death, Queen Margaret made him bailiff of the Kentish hundreds formerly held by the duke.
The second Parliament of 1449, which had assembled at Westminster in November, had seen the Commons attack William de la Pole, duke of Suffolk, held responsible for the state of the realm and the disastrous conduct of the war in France. Impeached by the Commons, Suffolk was judged by the King on 17 Mar. 1450 and sentenced to banishment from all his dominions for five years from the following 1 May. On 2 May, on his way to Calais, he was murdered aboard a small ship in Dover Road and his body was thrown onto Dover sands. According to one contemporary source, news of the duke’s murder reached the sheriff, Cromer, who took the corpse into his custody (even though Dover was, of course, outside his jurisdiction), and sent his under sheriff to inform the judges and the King at Leicester and to ask for further instructions. Cromer then accompanied Suffolk’s body on its journey, through Canterbury on 22 May, and via Rochester to London. It was probably during this time that the sheriff made the infamous threat that the King would turn the county into a ‘wylde fforest’ to avenge the duke’s death. This rumour, which featured at the beginning of the first manifesto issued by the rebels amassing in Kent, may have been decisive in raising the commons in rebellion as Cromer and Suffolk’s body passed through the county.
As Kent rose in what has become known as Cade’s rebellion, Cromer may have travelled up to Leicester to join his father-in-law, who was with the King at Parliament. If so, they quickly returned to London and on 13 June King Henry established himself at St. John’s hospital, Clerkenwell, while the rebels camped at Blackheath. Both Saye and Cromer were almost certainly with the King at this time. On 19 June, when some members of the royal household threatened to go over to Cade unless justice was done on the ‘traitors’, Henry committed Saye to the Tower and it seems likely that Cromer was sent to the Fleet prison at the same time. This may have been for their own safety, but more likely it represented the turning of the tide against those perceived by some of those close to the King, as well as the rebels themselves, as the men principally responsible for the uprising.
Most historians have followed the rhetoric of Cade’s manifestos and have dismissed Cromer as a ‘corrupt and malevolent administrator’ who exploited his position as Lord Saye’s son-in-law to enable himself and his officials to oppress the people of Kent during his two shrievalties.
Nevertheless, as the administrators of his goods discovered, Cromer appears to have been a genuinely unpopular figure. From 1452 Thomas Winslow II* and Cromer’s brother-in-law, William Fiennes, the new Lord Saye, brought a number of suits in both the common pleas and King’s bench regarding close-breaking at his properties in Kent and London and theft of his possessions during the summer of 1450. Typical of these was the plea against Richard Cosington of Rainham, gentleman, and a group of local husbandmen who were alleged to have stolen 600 cattle from his manors of Tunstall and Murson.
The exact reasons for Cromer’s unpopularity are now difficult to distinguish. His association with James, Lord Saye, seems to have been the principal cause. His rapid rise to office within Kent was clearly due to his father-in-law’s influence and he and Saye may have seemed to the commons of the county exemplars of the ‘persones of lower nature exaltyd & made cheyff of the privy counsell’ who had prevented the true lords of the royal blood from counselling the King and who were responsible for the parlous state of the realm. The chroniclers made clear this association by having Saye and Cromer appear to have been executed on the same day; indeed the author of one London chronicle makes the relative importance of the various reasons for Cromer’s murder explicit, describing him as ‘oon Crowmere a Squyer that hadde wedded the lorde Sayes dowghter and had been shireff of Kent and doon grete extorcion there as they seid’.
Shortly after her husband’s death, Elizabeth Cromer married Alexander Iden, the man who had replaced Cromer as sheriff and on 12 July 1450 at Heathfield in Sussex had captured Cade, mortally wounding him in the process.
