committee hearing the Commons' complaints. The result of these discussions was an altercation in which the Commons, reports the parliament roll, were "hugely disturbed". This disturbance, according to J. H. Wylie, was probably the result of something Ros said and would account for the Commons' reluctance to meet him or his committee. Ros's remit was to persuade the Commons to grant as substantial a tax—in exchange for as few liberties granted—as possible. An experienced parliamentarian, he attended most parliaments from 1394 to 1413. Almost from the beginning of his reign, Henry faced problems. Most stemmed from financial insecurity since by 1402 his treasury was empty. Around this time, Ros was appointed Lord Treasurer. Charles Ross suggests that this demonstrated the king's increased confidence in Ros, who occupied the post for the next four years. He was unable to substantially improve Henry's financial situation, and relations with the Commons worsened. During the 1404 parliament, speaker Arnold Savage confronted the king over his lack of money (and repeated demands for taxation), which Savage said could be ameliorated by reducing the number of annuities paid by the crown. Savage also condemned an unnamed crown minister for owing royal creditors over £6,000. The House of Commons' dissatisfaction was obvious to the king, who responded within the week. He despatched Ros, accompanied by Chancellor Henry Beaufort, to the Commons with a comprehensive breakdown of the king's financial requirements. According to Ian Mortimer, "Savage, having attacked royal policy in the King's presence, had no compunction about speaking his mind to the chancellor and treasurer". Henry's government continued to subsist on poor revenues. As Given-Wilson put it, the treasury became "largely reliant on a diminishing circle of the faithful" (which included Ros). He made numerous loans to the king, and temporarily surrendered his councillor's salary for the sake of the royal finances. Ros also performed extensive military service. In 1400, he contracted with the king to bring a fully crewed ship of twenty men at arms and forty archers to Henry's Scottish invasion. Although the campaign fizzled out, Ros played a part in it. Returning to Westminster, he resumed his office of councillor and participated in Henry's Great Council the following year. In 1402 Owain Glyndŵr rebelled, which impacted Ros personally. His brother-in-law, Reginald, Lord Grey of Ruthin—who had married Ros's youngest sister, Margaret—was captured and imprisoned by Glyndŵr; personal animosity between Grey and Glyndŵr may have