In March 1588 he was made keeper of the East and West
Lomond Hills of
Fife, hills near
Falkland Palace. He was
Comptroller of Scotland, in charge of a branch of royal finance and expenses of the household from November 1588 to 1597. The position of comptroller left him with debts. Seton audited an account of money spent during
James VI's voyage to Norway and Denmark by the
Chancellor,
John Maitland. Maitland passed the remaining
Danish dowry money given to
James VI to Seton. He invested it with several Scottish "burghs" or towns at 10% interest. James VI withdrew the money by 1594, much of it to finance the
masque at the baptism of Prince Henry. In May 1590 Seton drew up a rental of the income and expenditure of the lands of
Dunfermline Abbey for the benefit of two Danish ambassadors,
Steen Bille and
Niels Krag, who came to Scotland to assess Anna of Denmark's marriage settlement. Outgoings include the wages of several kirk ministers and of
John Gibb, keeper of
Dunfermline Palace and others. On 6 May 1593 the
Duke of Lennox and 15 friends including Seton subscribed to a frivolous legal document swearing to abstain from wearing gold and silver trimmings on their clothes for a year, and defaulters were to pay for a banquet for all of them at
John Killoch's house in Edinburgh. This "
passement bond" was in part inspired by cheap counterfeit gold and silver thread used in "passements great or small, plain or
à jour, bissets, lilykins, cordons, and fringes" which quickly discoloured. The signatories included;
Lord Home, the
Earl of Mar,
Lord Spynie, the
Master of Glamis,
Sir Thomas Erskine,
Walter Stewart of Blantyre,
William Keith of Delny, and
Sir George Home. In 1593 he was involved in a boundary dispute at
Torwood forest with John Drummond of Slipperfield, father of the poet
William Drummond of Hawthornden. The Torwood belonged the lands of the Chapel Royal and had a boundary with Forrester's Mansion, or
Torwood Castle.
Alexander Forrester of Garden assembled a company of armed men to intimidate commissioners intending to walk the boundary. In December 1593, David Seton was appointed to a committee to audit the account of money spent by the
Chancellor,
John Maitland of
Thirlestane, on the
royal voyages. The funds in question came from the
English subsidy and the dowry of Anne of Denmark. In 1594 the
Parliament of Scotland recognised that he was "superexpended" in his comptrollery account by £8,297
Scots. He died in 1601. ==The Seton portrait miniature of Mary, Queen of Scots==