I. John Sinclair, first of Lybster, was eldest son
of John Sinclair, first of Assery, and his second wife,
Margaret Davidson. In 1647 he was appointed "Bailie
of Latheron" by the Earl of Caithness; in 1655 he ob-
tained a wadset of Lybster from the Earl of Caithness;
and in 1692 the property was acquired by his son and
successor, who obtained the right of reversion of the
wadset. He married Beatrix Sinclair, supposed to have
been of the Thura family, and had-
1. James, his successor.
2. George, whose only daughter, Beatrix, married
Alexander Sinclair of Sixpennyland.
1. Elizabeth, who married Alexander Boynd in
Thurso.
 
II. James Sinclair, second of Lybster, married
Katharine, daughter of Patrick Sinclair of Ulbster, and
had five sons and two daughters:-
1. John, his successor.
2. Patrick, in Northfield in 1702, and who had a son,
Alexander, afterwards of Lybster.
3. William of Roy and Scotscalder.
4. Robert of Geise, Advocate.
5. George (1731).
1. Beatrix, eldest daughter, who married, in 1707,
James Sutherland in Ausdale.
2. Elizabeth, who married John M'Kay in Kirtomy,
third son of John M'Kay of Strathy and Dirlot.
 
III. John Sinclair, third of Lybster, styled "Fiar"
in 1694, and "of Lybster" in 1709, succeeded his father,
James, and died without issue.
 
IV. Alexander Sinclair, fourth of Lybster, was
the nephew of John, last of Lybster, and son of Patrick
Sinclair in Northfield. In 1710 he was served heir to
his uncle, and to his grandfather, James. He married
Æmilia, daughter of Alexander Sinclair of Sixpenny, and
had a son and three daughters
1. Patrick, his successor.
1. Katharine, eldest daughter, who married James
Sinclair of Harpsdale, and was his third wife.
2. Margaret, who died unmarried.
3. Æmila, who died unmarried.
 
V. Lieutenant-General Patrick Sinclair, fifth
of Lybster, married Catharine Stewart, and had four
sons and a daughter:-
1. Temple Frederick, his successor.
2. Jeffrey, Surgeon-General in the Bombay Army,
who left two daughters.
3. Thomas Aubrey, Stipendiary Magistrate at Granada,
where he died unmarried.
4. Patrick, who died unmarried.
1. Susan, only daughter, who married David Laing,
Surgeon in Thurso, and died in 1865, leaving
issue.
VI. Temple Frederick Sinclair, the sixth and
last of Lybster, was a Captain in the Army, and died
unmarried. In 1868 the estate was sold by his trustees
to the Duke of Portland for £24,000.
I. William Sinclair, third son of James Sinclair of
Lybster, had the lands of Hoy and Geise, and in 1729,
he exchanged them with James Murray, son of Patrick
Murray of Pennyland, for the estate of Scotscalder,
which formed part of the Bishopric of Caithness, and
was acquired in feu by the Caithness family, and by
them wadsetted to the Murrays of Penilyland, who
afterwards acquired the right of reversion. In 1713,
William Sinclair adjudged Ulgrimbeg and Ulgrimore
from the Sinclairs of Assery, and these lands were also
originally church lands. He had three sons and two
daughters:-
1. Alexander, of whom there is little further notice,
unless he is the same person as Alexander Sinclair
of Sixpenny.
2. John, afterwards of Scotscalder.
3. Robert. In 1734 John Sinclair mentions his
"brother Robert,, in a letter in which he orders
him to receive clothing such as would be required
by a person in the seafaring line, such as canvas
jackets, etc.
1. Janet, eldest daughter, who married John M'Kay,
third of Strathy, and received a tocher of 6000
merks. The contract of marriage is dated 29th
April 1731, and is witnessed by Francis Sinclair
of Milton, William Sinclair, younger of Dun,
Benjamin Williamson of Banniskirk, and others.
She had two daughters, of whom Margaret married
Patrick Honyman of Graemsay; and Barbara
married Major John Scobie of Melness.
2. Barbara.
 
II. John Sinclair, the Second of Scotscalder,
married Isabella, only daughter of John Sinclair, fourth of
Assery, by his second wife, Barbara Murray, daughter of
Patrick Murray of Pennyland. On his marriage in 1731
his father conveyed to him, with consent of his eldest
son, Alexander, the lands of Scotscalder, Ulgrimbeg, and
Ulgrimore. He had two sons and four daughters:-
1. William.
2. Robert.
1. Isabella, eldest daughter, was second wife of Captain
Thomas Dunbar of Westfield. She died in 1829,
and was interred in the chapel at Pennyland.
Captain Dunbar was the second son of Alexander
Dunbar of Grangehill, and he was the male
representative of that family, which is descended
from Sir Alexander Dunbar of Westfield, son of
James, Earl of Moray. Captain Dunbar took
the designation "of Westfield." He purchased
Milton-now called Westfield-and Sibster (for
Captain Dunbar's first marriage, vide Dunbar of
Hempriggs); and by his second wife, Isabella
Sinclair, he had two sons and three daughters
James, who married a daughter of the Rev. Mr.
Cameron, Halkirk, and died without issue; and
Alexander, who was tenant of Scrabster and other
Crown lands, and died unmarried in 1859;1 the
daughters were Isabella, Mrs. Robinson, who
left a daughter; Barbara, Mrs. Guthrie, who
had two sons, namely, the late Colonel Charles
Seton Guthrie of Scotscalder, and James Baillie
Guthrie; and Catharine, Mrs. M'Gregor, who
had issue.
2. Barbara, the second daughter of John Sinclair,
married William Sinclair of Rattar, tenth Earl
of Caithness.
3. Margaret.
4. Catharine.
One of these two ladies was second wife of James
Sinclair of Holbornhead.
 
III. Robert Sinclair, Third and Last of Scots-
Calder, had an only son, Lieutenant-Colonel James
Sinclair of the Royal Artillery, and two daughters,
one of whom married Mr. Aitken, and had a son,
who died young; while the other married Mr. Steel
an excise officer, and had issue. About 1812 he sold the
estate.1