Hello Lea-Anne,
There are 2 female deaths for surname Cowan in Kirkpatrick-Juxta, Dumfries-shire between 1871 & 1881.
Grace Waugh Cowan, 1877 aged 28yrs.
Margaret Cowan, 1880 aged 51yrs. (ScotlandsPeople)
1851. Glasgow, Lanarkshire.
Thomas Cowan 31 b Kirkpatrick. (Railway Clerk)
Margaret " 27 b Johnstone.
Martha " 4 b Kirkpatrick.
Grace " 2 b Edinburgh.
Margaret " 7mons b "
1861. Lanark, Lanarkshire.
Thomas Cowan 41 b Kirkpatrick. (Station Master)
Margret " 37 b Johnstone.
Martha " 14 b Kirkpatrick.
Grace " 17 b Edinburgh. (Age might be a Transcription Error)
Margret " 10 b "
Jamima " 6 b Lanark.
Jane " 4 b "
Willimina " 7mons b "
1871. Kirkpatrick-Juxta, Dumfries-shire.
Thomas Cowan 50 b Kirkpatrick-Juxta. (Station Master)
Margaret " 45 b Johnstone.
Martha B " 22 b Kirkpatrick-Juxta.
Jemima " 16 b Lanark.
Jane Gibson " 14 b "
Williamina G " 10 b "
Thomas " 7 b Kirkpatrick-Juxta.
1881. Kirkpatrick-Juxta, Dumfries-shire.
Thomas Cowan 61 b Kirkpat-Juxta. (Station Master)
Jane " 24 b Lanark.
Williamina " 20 b "
Thomas " 17 b Kirk-Juxta.
Grace Cowan 84 b " " (Mother)
1891. Moffat, Dumfries-shire.
Thomas Cowan 71 b Kirkpk-Juxta. (Rtd. Stationmaster)
Jane " 32 b Lanark.
Wm F Moryson 25 b Ireland. (Lodger)
This might be Margaret 1841. Johnstone, Dumfries-shire.
William Gibson 50 (Farmer)
David " 15
Robert " 15
Margaret " 15
Thomas " 14
George " 13
All born Dumfries-shire. (A*try)
Adult ages on 1841 Census are rounded down to nearest 5. David, Robert & Margaret could be any age between 19 & 15.
Hope there is some new information there.
Regards, Dod.