Gary,
Is this your family in 1861:
1861 Scotland Census 1861 Scotland Census
Name: William Allison
Age: 26
Estimated Birth Year: abt 1835
Relationship: Head
Spouse's name : Margaret Doherty
[Margaret Allison]
Gender: Male
Where born: Lochwinnoch, Renfrew
Registration Number: 644/10
Registration district: Hutchesontown
Civil parish: Glasgow Govan
County: Lanarkshire
Address: 37 Salisbury St
Occupation: Railway Fireman
ED: 79
Household schedule number: 103
Line: 24
Roll: CSSCT1861_113
Household Members: Name Age
William Allison 26
Margaret Doherty 26
Margaret Allison 26
Walter Allison 7
Jean Allison 4
John Allison 1
Rachel Docherty 24
Janet Damian 30
This Margaret (Doherty) Docherty Allison was born in County Derry, Ireland as was the boarder Rachel Docherty. If you go to the IGI and do a parent search you will get names of six children--those on your list plus Walter. Walter and John appear to marry and still be around Glasgow in 1901. Can't help you with the SP searches. I'm over budget and out of credits for a couple more weeks!
Carol
I see Andrew has been there and done that faster than me!