RootsChat.Com

Yes, I thought it was part of the castle.  I am pretty sure they were all employees at the time.  Looks like the Sinclairs were the owners at that time.
Any chance you looked at that 1871 census?  It shows Catherine Sutherland, 94y as the mother and there are 40 in the list that show Catherine as their mother, some as young as 3 years of age.  I am assuming they are children, grandchildren, and great-grandchildren.  I would love to find out who was her husband and who are her children.

It would not accept the attachment, so go to this site:
https://search.ancestry.com/cgi-bin/sse.dll?db=1871Scotland&indiv=try&h=1285706
If you click on each person, it will show the relationship to the mother, Catherine Sutherland.  Otherwise, I have spelled it out in an attachment that already shows the relationship.
Why won't it accept the attachment of 13 KB when the limit is 500 KB?  I will change it so it is more readable.  Still didn't work.

I found another site that also showed Robert Gunn as son of John Gunn 11 Jan 1787, Latheron Parish-16 Sep 1861 Ramscraigs, Dunbeath, and Henrietta Sutherland.  It showed John's parents as William Gunn 1754-1791 and Margaret Sutherland m. 15 Jan 1769 in Latheron parish.
It also showed Henrietta's parents as John Sutherland and Ann Sutherland m. 6 June 1785.
However, none of these showed a Janet Sutherland m. to Robert Sutherland, parents of my Janet Sutherland, among the list of their children.
I am amazed at how many Sutherlands married each other.  No wonder searching is so difficult.
I guess the best thing to do is try to find death certificates for Robert Sutherland and Janet Sutherland, knowing they both died before Janet' death in 1873; and John Campbell's parents, William Campbell and Isabella Gow, both deceased before John's death in 1868.

John Campbell b. 1786 Latheron Parish, Berriedale, Caithness, d. 31 Oct 1868 Lyhaid, Latheronwheel, Caithness, m. Janet Sutherland b. 1795, Latheron Parish, Berriedale, d. 17 Jan 1873, Ramscraigs, Dunbeath, Caithness.
1841 Census: 1841 Latheron Parish, Berriedale, Caithness, Scotland census, p. 8-9, Lower Borgue. John Campbell 45y, fisherman; Janet 46y, Janet 18y, George 15y, all b. Caithness.  Also living with them is George Grant 12y, agricultural laborer, b. Caithness.
1851 Census: 1851, 38, p. 2, #5, Bualglass: John Campbell 65y, farmer of 4 acres, Janet 68y, son George 24, unm., ploughman, all b. Latheron, Caithness.
Children:
 Isabella Campbell b. 25 Dec 1814, Latheron Parish, d. 6 Sep 1900, Ramscraigs; m. 18 Jan 1836, Latheron Parish, to John Murray, b. 13 Apr 1809, Kildonan, Sutherlandshire, d. 1875.  1851, 1861, 1871 censuses.
 Janet Campbell b. 28 Jan 1820, Latheron Parish, d. 9 Dec 1901, Borgue, Berriedale, m. 2 Jan 1846 to Robert Gunn b. c. Feb 1813, Caithness-shire, d. 15 Oct 1897 Borgue, Berriedale.
1851, 1871, 1881 censuses.
 George Campbell (my 2nd g-grandfather) bp. 5 Dec 1823, Latheron Parish, Berriedale, d. 2 Jul 1889, Berriedale, m. 26 Dec 1851 to Catharine Bain bp. 29 Nov 1822 Latheron Parish, Berriedale, d. 29 Jun 1900 Berriedale
1861, 1871, 1881 censuses.

John Campbell's death certificate:
Parish of Latheron in the County of Caithness, Scotland, p. 29.
John Campbell, pauper (formerly a crofter & fisherman), m. to Janet Sutherland; d. 1868, October Thirty-First, 5h 30 min P.M., Lyhaid, Latheronwheel.  Male, aged 82 years
Father: William Campbell, farmer (deceased)
Mother: Isabella Campbell; maiden surname Gow (deceased)
Cause of death: Asthma, 2 years, no regular medical attendant.
Informant:  Robert Campbell, brother, present.
Registered:  2 Nov 1868 at Latheron, Alex. Gunn, Registrar

Janet Sutherland's death record:  Parish of Latheron in the County of Caithness, Scotland, p. 3.
Janet Campbell, pauper (widow of John Campbell, crofter & fisherman).
Died 7 Jan 1873, 1h. 0 min, A.M., Ramsanaigs, Dunbeath, aged 94 years.
Father: Robert Sutherland, crofter & fisherman (deceased).
Mother: Janet Sutherland, maiden name Sutherland (deceased).
Cause of death: Debility from old age.
Informant: John Murray, son-in-law, present, Alex. Gunn, witness, Registrar.
Registered: 14 Jan 1873 at Latheron, Alex. Gunn, Registrar.

The 1871 Census for Latheron Parish:
1871 Scotland Census, Latheron Parish, ED: 17; Line: 2, Page: 16, HH #90.
Very large household with occupants listed alphabetically.  No Campbells.  Includes: John Murray 63y, Isabela Murray 55y, Thomas 25y, Betsey 22y, Robert 18y, Isabella 16y, & James 13y. [This family of Murrays contains  Isabela and her family which are Janet's daughter, son-in-law and grandchildren.]  29 Sutherlands including Catherine 94y and Janet 93y.