Hi Ken,
Harriet Laing had two children, Robert Alexander Laing Sinclair. my father and Flora Sinclair, who was known as Florence to several branches of the family, which I only discovered this year. Flora was married twice.
This is what I have on Harriet Laing's parents and siblings.
Husband Alexander Laing
Birth May 23, 1859 North Uist, Inverness-shire, Scotland, United Kingdom
Marriage
Death May 30, 1930 North Uist, Inverness-shire, Scotland, United Kingdom
Burial After May 30, 1930 North Uist, Inverness-shire, Scotland, United Kingdom
Parents John Laing and Margaret Laing [MacDonald]
Wife Flora Laing [Macdonald]
Birth Oct. 15, 1863 North Uist, Inverness-shire, Scotland, United Kingdom
Death Apr. 24, 1938 23 Cnoc an Torran, North Uist, Scotland, UK
Parents Roderick (Rory) MacDonald and Harriet MacDonald
Children
1 Margaret Laing
Gender Female
Birth Sep. 11, 1884 23 Cnoc an Torran, North Uist, Scotland, UK
Husband
Marriage
Death Before 1905 Glasgow, Scotland, UK
Burial
2 Roderick Laing
Gender Male
Birth Sep. 22, 1886 North Uist, Eilean Siar, Scotland, United Kingdom
Wife
Marriage
Death Dec. 10, 1950 North Uist, Eilean Siar, Scotland, United Kingdom
Burial
3 Harriet Sinclair [Laing]
Gender Female
Birth May 4, 1889 North Uist, Inverness-shire, Scotland, United Kingdom
Husband Archibald Sinclair
Marriage Nov. 16, 1916 Govan Parish Church, Govan, Glassgow
Death 1961 Denniston, Glasgow
Burial
4 John Archibald Laing
Gender Male
Birth Jun. 29, 1891 Knockintorran, North Uist
Wife
Marriage
Death Kirn, Argyll & Bute, Scot
5 Donald Ewen Laing
Gender Male
Birth Nov. 23, 1893 North Uist, Eilean Siar, Scotland, United Kingdom
Wife Mary Myrtle Laing [Givens]
Marriage
Death Dec. 7, 1949 Detroit, Wayne, Michigan, United States
6 Anne Laing
Gender Female
Birth Feb. 22, 1896 Knockintorran, North Uist, Inverness-shire, Scotland, United Kingdom
Husband
Marriage
Death Glasgow, Lanarkshire, Scotland, United Kingdom
Burial
7 Alexander Laing
Gender Male
Birth Jan. 3, 1899 North Uist, Inverness-shire, Scotland, United Kingdom
Death Glasgow, Lanarkshire, Scotland, United Kingdom
Burial
8 Archibald Laing
Gender Male
Birth Apr. 17, 1901 Knockintorran, North Uist, Eilean Siar, Scotland, United Kingdom
Death Devizes, Wilts, England
Burial
9 Flora Laing
Gender Female
Birth Apr. 19, 1903 Knockintorran, North Uist
10 Margaret Laing
Gender Female
Birth Aug. 5, 1905 Knockintorran, North Uist, Eilean Siar, Scotland,
Death Glasgow, Lanarkshire, Scotland, United Kingdom
11 Marion MacInnes [Laing]
Gender Female
Birth Dec. 27, 1907 North Uist, Inverness-shire, Scotland, United Kingdom
Husband John Archibald MacDonald MacInnes
Marriage Aug. 30, 1938 Knockintorran, North Uist, Eilean Siar, Scotland,
Death About 1974 North Uist, Eilean Siar, Scotland, UK
12 Norman Laing
Gender Male
Birth Nov. 19, 1910 North Uist, Inverness-shire, Scotland, United Kingdom
Wife Christina Sutherland Laing [Bremner]
Marriage 1945 Morningside, Edinburgh
Death 1986 Wick Caithness Scotland
Burial Wick, Cathness