Question: What was the title of the man who Sir Thomas Hungerford made his fortune working as a steward to?

<P0-S0> John of Gaunt, 1st Duke of Lancaster, (6 March 1340 – 3 February 1399) was an English nobleman and member of the House of Plantagenet, the third of five surviving sons of King Edward III of England and Philippa of Hainault. <P0-S1>  He was called "John of Gaunt" because he was born in Ghent, then rendered in English as "Gaunt". <P0-S2>  When he became unpopular later in life, scurrilous rumours and lampoons circulated that he was actually the son of a Ghent butcher, perhaps because Edward III was not present at the birth. <P0-S3>  This story always drove him to fury. <SEP> <P1-S0> Farleigh Hungerford Castle, sometimes called Farleigh Castle or Farley Castle, is a medieval castle in Farleigh Hungerford, Somerset, England. <P1-S1>  The castle was built in two phases: the inner court was constructed between 1377 and 1383 by Sir Thomas Hungerford, who made his fortune working as a steward to John of Gaunt. <P1-S2>  The castle was built to a quadrangular design, already slightly old-fashioned, on the site of an existing manor house overlooking the River Frome. <P1-S3>  A park was attached to the castle, requiring the destruction of a local village. <P1-S4>  His son, Sir Walter Hungerford, a successful knight and courtier to Henry V, became rich during the Hundred Years War with France and extended the castle with an additional, outer court, enclosing the parish church in the process. <P1-S5>  By Walter's death in 1449, the substantial castle was richly appointed and its chapel decorated with murals. <SEP> <P2-S0> Baron Portal of Hungerford, of Hungerford in the County of Berkshire, was a title in the Peerage of the United Kingdom. <P2-S1>  It was created in 1945 for Marshal of the Royal Air Force Sir Charles Portal upon his retirement as Chief of the Air Staff, with remainder in default of male issue to his daughter, Rosemary Portal, and the heirs male of her body. <P2-S2>  In 1946 Portal was further honoured when he was created Viscount Portal of Hungerford, of Hungerford in the County of Berkshire, also in the Peerage of the United Kingdom, with normal remainder to the male issue of his body. <P2-S3>  The viscountcy became extinct on Lord Portal of Hungerford's death in 1971 as he left no surviving sons, while he was succeeded in the barony according to the special remainder by his daughter Rosemary. <P2-S4>  She sat as a cross-bencher in the House of Lords. <P2-S5>  However, Lady Portal of Hungerford died without issue, and the barony became extinct on her death. <SEP> <P3-S0> The Oliver Gascoigne family originated at the point that Richard Oliver, originally of Castle Oliver, Limerick, Ireland, inherited the fortune of Sir Thomas Gascoigne of Parlington Hall, Yorkshire, in 1810. <P3-S1>  Sir Thomas made it a stipulation of his will that Richard add 'Gascoigne' to his name. <P3-S2>  Richard had married Sir Thomas's stepdaughter, Mary Turner, in 1804. <P3-S3>  Richard and Mary had two daughters, Isabella and Elizabeth, who inherited their parents' fortune in 1843. <P3-S4>  The sisters demolished their ancestral home in Ireland, and built a new Castle Oliver a few hundred yards to the north east. <P3-S5>  The castle still exists.