He was seriously ill in the autumn of 1597, and was created
Baron Howard de Walden by
writ of summons. While he recovered from his illness, he was unable to attend Parliament until January 1598. On 2 February 1598, he was admitted an honorary member of
Gray's Inn. In 1599, he commanded the fleet in
The Downs; in that same year, he became an admiral.) A friend of
Sir Robert Cecil, he became acting
Lord Chamberlain at the close of 1602, and entertained the Queen at the
Charterhouse, towards the end of her life in January 1603. Under
James I, Howard immediately entered the King's favour, being appointed Lord Chamberlain on 6 April 1603 and a
Privy Counsellor on 7 April. Later that year, on 21 July 1603, he was created
Earl of Suffolk. He was also appointed a commissioner for creating
Knights of the Bath, and from 1604 to 1618 a commissioner for the
Earl Marshalcy. He was appointed
Lord Lieutenant of Suffolk in 1605, having several years earlier been made
Lord Lieutenant of Cambridgeshire. Suffolk accepted a gift from the Spanish ambassador negotiating the peace treaty of 1604, but his countess proved a more valuable informant and Catholic sympathiser. Avaricious, she accepted an annual pension of £1000 from the Spanish. While Suffolk was less pro-Spanish and pro-Catholic than his wife, she was felt to dominate her husband in matters of politics, a circumstance which would later bring him to grief. By 1605, Cecil, now Earl of Salisbury, Suffolk, the
Earl of Northampton, and the
Earl of Worcester were James's principal privy counsellors. Suffolk and Salisbury were both privy to the communications made by
Lord Monteagle revealing the existence of the
Gunpowder Plot, and Suffolk examined the cellar, spotting the brushwood concealing the gunpowder. Later that evening, the Keeper of the Palace,
Sir Thomas Knyvet (Suffolk's brother-in-law) made further search, revealing the gunpowder, and the plot collapsed. Suffolk was one of those commissioned to investigate and try the plotters. Numbered by James as one of his "trinity of knaves" (with Salisbury and Northampton), he was nonetheless thought loyal and reliable to the King. By 1607, work was completed on
Charlton Park, a house which is still home to his descendants. In December 1608, Salisbury's eldest son and heir,
William married Suffolk's third daughter, Catharine. Salisbury, who died in 1612, praised Suffolk's friendship in his will; and upon his death, Suffolk was appointed one of the Lords of the Treasury. Though he disliked
Sir Robert Carr, the royal favourite, Suffolk supported his daughter Frances' desire to divorce her husband, the
Earl of Essex to marry him. She did so in December 1613, shortly after his creation as Earl of Somerset. On 8 July 1614, Suffolk was appointed
Chancellor of the University of Cambridge, replacing his kinsman Northampton, and on 11 July 1614 was made
Lord High Treasurer. His new son-in-law, Somerset, replaced him as Lord Chamberlain, and Suffolk and his family now dominated the court. In 1615, however, Suffolk's fall began. James had become deeply infatuated with
Sir George Villiers, and Suffolk's daughter Frances, now Countess of Somerset, was implicated in the poisoning of
Sir Thomas Overbury. Suffolk was accused by James of complicity with Somerset in trying to suppress the investigation of the crime, but successfully weathered the storm. However, Suffolk then made the mistake of attempting to undermine the rising power of Villiers by grooming another handsome young man to succeed him in James's favour. Completely unsuccessful, this only provoked a counterattack by Villiers, now (1618) Marquess of Buckingham, upon Suffolk's conduct as Lord High Treasurer. Suffolk's finances were always in a perilous state. His early privateering and naval ventures nearly bankrupted him, despite some financial help from Queen Elizabeth. Under James, the situation was somewhat eased by his preferment at court, which gave him board and lodging and valuable emoluments, and the regrant of some of the sequestered estates of his father. Some of this he invested in land in
East Anglia, and he further benefited from a series of customs farms and bequests from relatives. He had been forced to sell his London residence, the Charterhouse, in 1611, but this was replaced in 1614 when he inherited the Earl of Northampton's house at
Charing Cross. Suffolk added to his own troubles with extravagant building programmes.
Audley End House, built from 1603 to 1616, was the largest private house in England. He also added an expensive new wing to Charing Cross, and his wife built
Charlton Park on the Knyvett estates she had inherited. Suffolk's children were also well provided for. He spent considerable sums to keep up their profile at court, and provided generous marriage portions to improve their matches. While this strategy was successful, it generated crushing debts for him, owing £40,000 in bonds and mortgages by 1618. His appointment as Lord High Treasurer in 1614 provided the opportunity to ameliorate his financial position through selling patronage and through deals with customs farmers, although it did not completely relieve his debts. It was also to prove the instrument of his downfall. ==Arrest and fall==