Watercolour of Old Wynd looking to Trongate from an album of 37 watercolours of Old Glasgow, Partick and Paisley by William Reid Mainds (fl. 1885-93). The Old Wynd linked the Trongate with the Bridgegate. The Old Wynd and New Wynd were laid out in 1573 to link the Trongate with the Bridgegate. In the 19th century the City Improvement Trust created Osborne Street which cut across both, and the railway obliterated the southern part. William Reid Mainds' watercolour is a rare illustration of one of the old roads going south from the Trongate,and shows the typical range of range of buildings which could be found there.
Timothy, I put Clayslap+Douglas into Google, and got several results.
I put Clayslaps+Douglas+slater in and found this in 1824:
Douglas, A. shoemaker, 8, New street, Calton Douglas, D. silk and cotton dyer, 46, High street Douglas, Edward, slater, Clayslap, near Kelvin bank Douglas, George, reedmaker, 94, Candleriggs Douglas, Geo. lead merchant and plumber, 591, Argyll st. Douglas, Hugh, merchant, 21, Carlton place Douglas, J. T. and A. & Co. merchants, 31, Miller street Douglas, J. slater, 45, St. Ninian street Douglas, James, slater, 21, New wynd Douglas, Jas. & Co. joiners, 22, Montrose street Douglas, John, writer, 32, Hutcheson street Douglas, J. milliuei', 631, Argyll street Douglas, J. C. writer, factor for Blythswood, 52; house, 10, Miller street Douglas, T. D. insurance broker. Tontine back buildings ; house, 1, Blythswood place Douglas, Peter, vintner, Woodlane, Broomielaw Douglas, Thos. grahi merc'a. Douglas court, Grahamston Douglas, W. & P. spirit & porter cellar, 17, Laigh kirk cl.
The more information you can give about the people you mention, the more chance there is of someone else connecting with your family.
Dates and places of births, deaths and marriages all help to place families.
Professions also help.
'My great-grandmother mother was a Douglas from Montrose' does not give many clues to follow up! But a bit of flesh on the bones makes further research possible. But if we are told who she married, what his profession was and where the children were baptised, then we can get to work.
Maybe it is time to update the information in your profile?