Hi Kargil
Not sure what it is about the Malcolm women but for some reason they like to appear older than they are

Just picking up from last night, trying to get some background on Agnes's mother Jane. Although she showed as 45 in her marriage in 1881, her actual age would appear to have been
35 25, with a birth year of 1856. The 4 on the MC could well be a 2, hard to make out.
This looks like her parents' marriage:
JAMES MALCOLM Marriages: Spouse: AGNES JARVEY
Marriage: MAR 1845 New Monkland, Lanark, Scotland
Children showing for this couple including Jane's details (there looks to have been a first Jane who may have died and second Jane born the following year):
1. JANET MALCOLM Birth: 16 APR 1862 Cambusnethan, Lanark, Scotland
2. MARY MALCOLM Birth: 07 JAN 1866 Cambusnethan, Lanark, Scotland
3. CHRISTINA MALCOLM Birth: 18 APR 1860 Cambusnethan, Lanark, Scotland
4. ROBERT MALCOLM Birth: 03 APR 1864 Cambusnethan, Lanark, Scotland
5. JAMES MALCOLM Birth: 19 JAN 1868 Cambusnethan, Lanark, Scotland
6. SARAH MALCOM Birth: 28 APR 1858 Cambusnethan, Lanark/ Death: 20 JAN 1941 Glasgow, Lanark, Scotland
7. JANE MALCOLM Birth: 22 FEB 1855 New Monkland, Lanark, Scotland
8. JANE MALCOM Birth: 14 APR 1856 New Monkland, Lanark, Scotland
I'll have a look for the family in the 1861 Census.
Regards.
Monica