For the whole building, see NS3975 : Dumbarton public library
and NS3975 : Dumbarton Public Library
. The stone is set above a fire exit on the eastern side of the building.
[Update: as of August 2016, anyone who would like a printout with my picture from this page, a very much cut-down version of my accompanying text from this page, and with absolutely no credit to me for either, can pick up a printed copy from Dumbarton Library, where they have a pile of them lying out. These days, it is too much to expect even library staff to set a good example with respect to copyright and licensing.]
The stone bears the text "Tu Des Corona Decus", and the dates 1732 and 1790. The stone came from the Mackenzie House (the townhouse of the Mackenzies of Caldarvan, on whom see NS4384 : Caldarvan House
). The Mackenzie House stood in the High Street, and 1732 and 1790 are the dates when it was built and enlarged, respectively. It was demolished in 1907; see NS3975 : Ancient stones, Glencairn's Greit House
for more information.
The stone is said to have originally come from St Mary's Collegiate Church, of which the most prominent remnant is NS3975 : The College Bow
. Smaller fragments of the Collegiate Church survive; some, like the one shown in the present photograph, have been incorporated into the fabric of later buildings; see NS3975 : Ancient stones, Glencairn's Greit House
for other examples (that item contains a link to a page with a picture of the Mackenzie House; in that picture, the stone shown in the present photograph can be seen above the central dormer window).
A good description of this stone can be found in Donald MacLeod's "Dumbarton Ancient and Modern" (1881), a large-format book, of which only 200 copies were printed.
In the section entitled "Old Tolbuith and Mackenzie's House", the book discusses the three dormer windows of the Mackenzie House. Of these, it says that "over the one to the left there is as finial a somewhat grotesque figure of a diminutive man or boy in sitting posture, having a round flat bonnet on his head. Over the imposing central window there is a Latin cross, crowned by a mitre, on one side of which there is a Scotch thistle, and on the other side a fleur-de-lys, all admirably sculptured, beneath which there is this inscription:– "Tu des, corona decus", "Do thou give me glory for a crown". The eastmost of the dormer windows has for finial a small globular shaped stone, which looks as if it had formed a portion of a pinnacle of the 'Auld Colledge'."
By "Auld Colledge", the author means the Collegiate Church. The facing page of the book features an illustration of the Mackenzie House, with this stone visible above the central dormer window. The old tolbooth appears in the same illustration; the Mackenzie House was on the north side of the High Street, and the old tolbooth was immediately next to it on the left (west). Readers can examine the same picture online: see the "Ancient stones, Glencairn's Greit House" link given above; that item has a link to the picture.