The Barony of Fingask was in the parish of Rhynd, about five or six miles from Perth. 
Sir John Dundas was loyal to his Sovereign and raised and maintained a troop of horse at his own expense for his Majesty's service (Charles1). This ruined him and he was forced to sell Fingask. Sir John Dundas purchased in 1655 a small property called Ballindarg, in the parish of Kirriemuir, in Forfarshire, which became for a time, the family home.

John Dundas of Fingask succeeded his father in 1624. He was knighted at Dunfermline by King Charles 1 in 1633. His loyalty to his sovereign induced him to expose his fortune in the royal cause, which was then greatly diminished.

Under the Commissariot of Brechin Sir John Dundas is listed 15/4/1662 and shown as sometimes of Fingask.

"The Diary of Mr. John Lamont" : 1650 - This year Mr. Robert Makgill, a Lord of the Session bought from Fenges Dindaffe (sic), commonly called the Baron of Feinges, his lands lying beside the waters of Tay, near the carse of Gowrie.

From the Early History of Kintore; " 1744- The said magistrates and town council do hereby nominate and appoint Thomas Dundass of Fingask Esqr, tacksman of the estate of Balquhan, lying within the presbytery of Garioch, who is a burgess of the said burgh, their commissioner to the next General Assembly of this Church"

In 1729 Thomas Dundas purchased the lands of Powfouls, in the parish of Airth, Stirlingshire. He also purchased part of the lands, with the kirklands of Bothkenner and obtained from the Crown a charter by which “the names and designations thereof were to be changed into that of Fingask for all time coming, to hold from the Crown for the duties therein specified. Dated at Edinburgh, 22 June 1732" The adjoining small property of Letham, also in the parish of Airth, was also purchased.

• M.P in Orkney and Shetland. 1768-1770. Burgess of Edinburgh. Deputy Lyon King of Arms. Commissioner of Police 

From The Daily Gazetter, Nov 3rd 1737. - "On Tuesday, Thomas Dundas of Letham, junior, was married to Miss Anne Graham, a virtuous and beautiful young lady, daughter to James Graham of Airth, Judge Admiral."

In 1750, Thomas Dundas purchased the property of Quarroll (later known as Carron Hall) and in 1751 he also purchased Torwood Castle, which remained in the Dundas family till the year 1882.

Torwood Castle.
The ruin of this castle stands about a quarter of a mile to the westward of the turnpike road from Falkirk to Stirling, surrounded by the remains of the ancient Caledonian forest. Its history is involved in much obscurity. It was long in possession of the Baillies, who were at the same time proprietors of Castlecarry, in the parish of Falkirk. One of these Baillies married a daughter of the first Lord Forrester, by whom he became father to the second Lord Forrester, from whom this estate came by purchase into the possession of the late Thomas Dundas, Esq. The forest of Torwood is associated with all that is ennobling in patriotism and personal valor. Here stood Wallace's oak, 12 feet in diameter, in the hollow of which he and his patriotic companions, it is said, used to meet and concert their plans for wrestling their country from the grasp of the ambitious Edward.

• Major-General in 80th Foot Regiment. MP for Orkney and Shetland 1771-1780, 1784-1790. Governor of Guernsey. Appointed to the board of commission in 1783 following the war with  America, to look into the claims for compensation to those "who having remained loyal to the mother country, had suffered in their rights, properties and profession" 

Thomas Dundas succeeded as Laird of Carron Hall upon the death of his father in 1786. He had entered the army in 1766 and served in America during the Seven Years War, which commenced in 1775, as Lieutenant Colonel of the 80th Regiment of Foot.

In 1782, Colonel Dundas returned home and in February of that year, peace was concluded with America and the treaty signed, which declared the United States "free, sovereign and independent." The war with America had ended, but it had left its legacy to the nation in a long list of claims for compensation to those "who having remained loyal to the mother-country, had suffered in their rights, properties and profession."

By an act of Parliament dated "the 23rd year of the reign of his present Majesty George the Third," 1783, a commission was appointed to examine the nature and justice of these claims. The appointment of commissioner was thus offered to and accepted by Colonel Thomas Dundas.

In 1793, Thomas Dundas joined Sir Charles Grey's expedition to the West Indies. He was now "Major General." The horrors of the French Revolution were at their height in the year 1793. The National Convention, under its leaders, Danton and Robespierre, had declared war with Great Britain early in the year and the object of the expedition, now starting at its close for the West Indies, was to attack the French in their possessions in those islands.

Major General Dundas was buried in the principal bastion of Fort Maltilde, on the island of Guadeloupe. When the French regained possession of Guadeloupe on the 10th December 1794, Victor Hughes, Commander of the French army issued the following proclamation;
" That the body of Thomas Dundas, interred in Guadeloupe, shall be taken up and given as prey to the birds of the air."

Many years later, there was discovered in a garden in Trinidad a marble urn and tablet and on the tablet was the following inscription;
"To the memory of MAJOR-GENERAL THOMAS DUNDAS,
who, with great professional abilities and with a mind generous and brave, fell a sacrifice to his zeal and exertion in the service of his King and country, on the 3rd day of June 1794, in the forty fourth year of his age. His remains were interred in the principal bastion of Fort Maltide, in the island of Guadeloupe, in the conquering of which he bore a most distinguished share, and which he commanded at his death.
This tablet was erected by his brother officers as a mark of their high esteem for his many valuable qualities, and their regret for his loss"

The outrage shown to the treatment by the French to the remains of so distinguished an officer, excited strong feelings in England and by a vote in the House of Commons it was agreed that a monument should be erected in St. Paul's Cathedral to the memory of Major-General Thomas Dundas.

In London, aged 68, Lieut. -Col. Thos. Dundas, of Carron-hall and Torwood. The deceased was the son of Major-Gen. Thomas Dundas and Lady Helena, daughter of the Earl of Home. He attended the Military College at Marlow, and afterwards entered the army as ensign in the 52nd Light Infantry, which formed part of the Light Division. He afterwards joined the 1st Royal Dragoons as lieutenant, and subsequently was appointed captain of the 15th Hussars. He marched into France with the army of occupation, but almost immediately returned home, and in 1815 married Charlotte Anna, daughter of Joseph Boultbee, esq., of Springfield-house, Warwick,
On the breaking out of the war the same year he rejoined his regiment, and in 1816 retired on half-pay with the rank of major, and was subsequently advanced to the rank of lieutenant- colonel. In private conversation the Colonel fought his battles o'er again with a hearty good will. He was firmly attached to the Established Church, in which he was an elder for many years. — Falkland Herald. May 25 1860.

the following children were born of this union:

* N.B The above marriage can not be confirmed as definitely being the correct William Dundas.

The family letters at Northallerton record office suggest that William was a troubled soul and caused his father some concern.