This label was kindly sent in by email. I believe this is William Bourlet who traded in London, from 1808 to 1829. One of a number of Bourlet framemakers who worked in England in the 19th century, the most famous of them being James Bourlet and Sons.
Another example of a Boots label, sent to us by email:
The two identical labels below which were originally posted on 18th September 2013
A third example of a Boots label, with a photo of the fluted frame it is on.
Second label originally posted 16th August 2012
First label below originally posted 14th August 2012
Boots is a nationwide chemist and pharmacist in the UK, and offered a picture framing service from 1894 to 1963 or later. In 1894 the business advertised its self as 'Printsellers, Carvers and Gilders, Picture Frame Manufacturers, Artists' Colourmen' selling 'English Gold Frames of the Highest Quality'.
The source of this and additional information on Boots, can be found on the National Portrait Gallery website: British Framemakers & British Artists's Suppliers.
A label from the paper used to wrap picture frame mouldings, found in the back of a frame along with pages from a Madras, India, newspaper dated 1937. The first label on the blog from India is a very decorative example.