Passage: The castle, still unfinished at the time of Thomas' execution, along with its lands, remained as crown property until it was bestowed on Henry, 3rd Earl of Lancaster, Earl Thomas' brother, in 1327. In turn it passed to Henry's son, the fourth earl, who became the first Duke of Lancaster. At the time of the duke's death in 1361, his constable was Ingram Fauconer, who received an annual life stipend of £10, a further £5 going to his wife. Henry's heiress was Blanche, wife of John of Gaunt. Duke John confirmed Fauconer's pension when he came into possession of the Lancastrian lands. Catalina, the three-year-old daughter of John by his second wife Constance of Castile, was given her own room and a Castilian attendant at the castle in 1375.Peter Melbourne was made keeper of the Melbourne estate in 1377 with an annual income of £10. He was granted another 66s 8d in 1386, and 10 marks (£6 13s 4d) in 1395. The last award was conditional on his not meddling with the offices of constable and keeper of the parks, which had passed on to his son, also called Peter. The younger Peter Melbourne was involved in the upbringing of the future Henry IV during the reign of Richard II. He was again appointed constable and steward of the Derbyshire manor in March 1399, although he gave up his office in April in return for an annuity from King Richard, who had confiscated the Lancastrian estates when John of Gaunt died earlier that year. Upon Henry's seizure of the throne, Peter was confirmed as constable, and in October 1399 his annuity was increased from £10 to 100 marks (£66 8s); in the following year he was awarded land in Derbyshire confiscated from Thomas Merke, Bishop of Carlisle, co-leader of plot against the King.The Duchy of Lancaster continued to improve and expand the property through the fourteenth and fifteenth centuries. John of Gaunt had windows glazed in the Communal Hall and the Great Chamber in 1392/3, along with other works. He repaired a drawbridge in 1393/4 and made plumbing improvements in 1399/1400, using...

Question: What was officially recognized by Duke John when the Lancastrian lands were acquired?
Fauconer's pension