Question: What king was the intended victim of the plot that Thomas Arundell was briefly suspected of being a part of the same year he became the 1st Baron Arundell of Wardour?

Passages:
Baron Howick of Glendale, of Howick in the County of Northumberland, is a title in the Peerage of the United Kingdom.  It was created in 1960 for Sir Evelyn Baring, the former Governor of Kenya.  A member of the famous Baring family, he was the third and youngest son of Evelyn Baring, 1st Earl of Cromer, and the great-grandson of Sir Francis Baring, 1st Baronet, the founder of Barings Bank.  Baring's uncle was Edward Baring, 1st Baron Revelstoke, the father of Maurice Baring, while other members of the family include Francis Baring, 1st Baron Northbrook, and Alexander Baring, 1st Baron Ashburton.  s of 2014 the title is held by the first Baron's son, the second Baron, who succeeded in 1973.  As a descendant of the first Earl of Cromer and Sir Francis Baring, 1st Baronet, he is in remainder to both the earldom of Cromer and its subsidiary titles and the Baring baronetcy of Larkbeer, titles held by his kinsmen the Earl of Cromer and the Baron Northbrook respectively. The Gunpowder Plot of 1605, in earlier centuries often called the Gunpowder Treason Plot or the Jesuit Treason, was a failed assassination attempt against King James I of England and VI of Scotland by a group of provincial English Catholics led by Robert Catesby. Thomas Arundell, 2nd Baron Arundell of Wardour (  1586 – 19 May 1643) was an English nobleman son of Thomas Arundell, 1st Baron Arundell of Wardour and Lady Mary Wriothesley. Anne Calvert, Baroness Baltimore (née Arundell; 1615/1616 – 23 July 1649) was an English noblewoman, daughter of Thomas Arundell, 1st Baron Arundell of Wardour by second wife Anne Philipson, and wife of Lord Baltimore, who founded the Province of Maryland colony.  Anne Arundel County in Maryland, (the third of the state's 23 counties/jurisdictions), in the U.S., was named for her.  In addition,  , an American naval transport ship of the Elizabeth C. Stanton-class was in turn named after the Maryland county.  It served in the United States Navy from 1940 to 1970. Thomas Arundell, 1st Baron Arundell of Wardour (ca. 1560 – 7 November 1639) was the eldest son of Sir Matthew Arundell of Wardour Castle in Wiltshire (ca. 1532/34–24 December 1598), and Margaret Willoughby, the daughter of Sir Henry Willoughby, of Wollaton, Nottinghamshire.  He distinguished himself in battle against the Ottoman Turks in the service of the Emperor Rudolf II, and was created a Count of the Holy Roman Empire.  His assumption of the title displeased Queen Elizabeth, who refused to recognize it, and imprisoned him in the Fleet.  In 1605 Arundell was created 1st Baron Arundell of Wardour.  In the same year he was briefly suspected of complicity in the Gunpowder Plot. Baron Revelstoke, of Membland in the County of Devon, is a title in the Peerage of the United Kingdom.  It was created in 1885 for the businessman Edward Baring, head of the family firm of Barings Bank and a member of the Baring family.  Baring was the son of Henry Baring, third son of Sir Francis Baring, 1st Baronet, and the nephew of Alexander Baring, 1st Baron Ashburton, the second cousin of Francis Baring, 1st Baron Northbrook, the elder brother of Evelyn Baring, 1st Earl of Cromer and the uncle of Evelyn Baring, 1st Baron Howick of Glendale.  He was succeeded by his second but eldest surviving son John, the second Baron.  John was a partner in Baring Brothers and Co. Ltd, a Director of the Bank of England, and also served as Lord Lieutenant of Middlesex.  On his death the title passed to his younger brother Cecil, the third Baron.  He acquired Lambay Island, north of Dublin, in 1904.  s of 2013 the title is held by his great-grandson, the seventh Baron, who succeeded his father in 2012.  As a descendant of Sir Francis Baring, 1st Baronet, he is also in remainder to the Baring Baronetcy of Larkbeer, a title held by his kinsman the Baron Northbrook. Henry Arundell, 3rd Baron Arundell of Wardour, PC (bef.  23 February 1607/828 December 1694) was a Peer of England during the 17th century, and the most famous of the Lords Arundell of Wardour.  He served as Lord Privy Seal and Lord High Steward, and was appointed to the Privy Council.  During the Popish Plot he suffered a long period of imprisonment, although he was never brought to trial. Baron Arundell of Wardour, in the County of Wiltshire, was a title in the Peerage of England.  It was created in 1605 for Thomas Arundell, known as "Thomas the Valiant", son of Sir Matthew Arundell (died 1598) and grandson of Sir Thomas Arundell (executed 1552) and of Margaret Howard, a sister of Queen Catherine Howard.  Arundell had already been created a Count of the Holy Roman Empire by Rudolph II in December 1595 (see below).  He was succeeded by his son, the second Baron.  He fought as a Royalist in the Civil War and was mortally wounded at the Battle of Stratton in 1643.  His son, the third Baron, was implicated in the Popish Plot and imprisoned in the Tower of London for six years.  However, after the accession of James II he was restored to favour and served as Lord Privy Seal from 1687 to 1688.  His great-great-great-grandson, the eighth Baron (the title having descended from father to son), was an avid collector of art and accumulated immense debts in building and furnishing New Wardour Castle. Sir Thomas Arundell (1454–1485) was an English nobleman.  He was made a Knight of the Bath at the Coronation of Richard III in 1483.  Two years later, when Richard III was defeated at the Battle of Bosworth (1485), he was attainted for rebelling against the King.  Arundell then gave his support to Henry Tudor in his claim to the throne.  His marriage to the heiress, Katherine Dynham, brought great wealth to the Arundell family.  She was one of the four sisters and coheirs of John Dynham, 1st Baron Dynham. Richard Arundell, 1st Baron Arundell of Trerice (1616 – 7 September 1687) of Trerice in Cornwall, was an English politician who sat in the House of Commons at various times between 1640 and 1664 when he was raised to the peerage.  He fought in the Royalist army in the English Civil War.

Supporting sentences:
 In the same year he was briefly suspected of complicity in the Gunpowder Plot. The Gunpowder Plot of 1605, in earlier centuries often called the Gunpowder Treason Plot or the Jesuit Treason, was a failed assassination attempt against King James I of England and VI of Scotland by a group of provincial English Catholics led by Robert Catesby.