Webby,
The only Mary Provan of similar age (17) is recorded at Mews Lane - Gorbals - Glasgow (1841)
This Mary Provan is recorded as born in Lanarkshire (Glasgow area - see below). However, the early census returns are not always accurate. I've found this in my own searches, with family members being recorded as born in Paisley on one census and then Glasgow on another. Also, some of my own ancestors moved to Gorbals from Paisley for work or to join other family. Both places were weaving centers.
For 1841 there is also a Mary Provan (age 15) recorded at Balcamie - Ayrshire (father James Provan). And a Isabella Provan (age 40) recorded at 19 Brunswick Street - Glasgow. If you need this information I can send it on.
Thanks for Provan trade directory information. Would be interested if there any Mc/MacDonalds, Mc/MacGibbons or Stewarts recorded for Paisley trades 1770's - 1850's.
Perhaps you can send me any links you have ? Thanks.
Regards - George
Surname First name(s) Sex Age Occupation Where Born
RENISON William M 55 Plumber England
RENISON (Mrs) F 50 Lanarkshire
RENISON Francis M 23 Blacksmith Journeyman Lanarkshire
RENISON Thomas M 18 Plumber Apprentice Lanarkshire
RENISON Jean F 7 Lanarkshire
PROVAN Mary F 18 Female Servant Lanarkshire Hello George
Thank you very much for looking for these illusive Provan people!. I think I may have come to a dead end with them.
My Mary Provan would have been about 17 years of age in 1841, but I haven't been able to find her in that Census.
Her marriage to William Kerr in 1846 gives his address as 84 High St and her address at 74 High St, Paisley. The 1851 Census Mary gives her birth place as being Paisley. So goodness knows where she was for the 1841 Census.!.
So if you ever come across a Mary Provan in your search, I would be very pleased to hear from you 
PS: The Kerr family she married into were Upholsterer's - in 1827 they were at 7 Gauze St then in the 1838/1839 Trade Directory there was a Robert Provan, Manufacturer listed at 170 Causeyside with another entry for William Provan, manufacturer at 9 Gauze Street.
Regards
Webby