Pelham supported Gaunt's son, Henry Bolingbroke—the later Henry IV—in his rebellion against Richard II. The king's forces besieged the castle, trapping Pelham and the garrison inside. In a letter sent to Bolingbroke, Pelham wrote: The siege failed, Bolingbroke was crowned and the new king granted the Castle and Honour of Pevensey to Pelham as a reward for his loyalty. The Lancastrian kings subsequently used the castle as a prison for high-ranking nobles. Its inmates included King James I of Scotland, who was captured while en route to France in 1405, and Edward of Norwich, 2nd Duke of York, who was held at Pevensey after becoming involved in a plot against Henry IV. On his death, Edward bestowed £20 in his will to Thomas Playsted, apparently one of his jailers, "for the kindness he showed me when I was in ward at Pevensey." Henry IV's second wife Joan of Navarre was imprisoned by Joan's stepson Henry V on charges of plotting to kill him through witchcraft; she was held at Pevensey between December 1419 and March 1420 before being moved to Leeds Castle and eventually released in 1422. When the Tudor dynasty took over the castle was abandoned, and by 1573 it was recorded to be in ruins. Usage in the modern period Elizabeth I ordered the castle's remains to be "utterlye raysed", but her order was not enforced and it remained standing. In 1587, the castle was reoccupied—though not rebuilt—to serve as a gun position against the threat of a Spanish invasion. A U-shaped earth emplacement was built in the outer bailey, facing south over the collapsed section of the Roman wall. Two iron demi-culverin cannons were installed and were in place at the time of the Spanish Armada in 1588, although the Armada failed and they were never used in anger. One of the guns, marked with a Tudor rose and the initials E.R. (Elizabeth Regina), has been preserved and can be seen in the inner bailey of the castle mounted on a replica carriage. Although the cannon was recorded at the time as being only "of small value" it is now one of only a few cast-iron cannons to have survived from the Elizabethan period. It was almost certainly manufactured locally in the Sussex Weald. Pevensey Castle remained abandoned and crumbling from the end of the 16th century to the first quarter of the 20th. It was nearly