Appearing in the July 1817 Ackermann’s Repository, this ad for low priced silks on Hanway street from the latest French patterns.
Hanway Street, near Tottenham Court Road, was originally formed in the early 18th century and was largely occupied by shopkeepers and tradesmen. Today, it features many “offbeat” coffee bars, clubs and restaurants (https://blogs.ucl.ac.uk/survey-of-london/tag/hanway-street/).
According to Johnstone’s London Commercial Guide and Street Directory (1817), Samiel Clark was a linen draper and laceman situated at No. 4 Hanaway.
Here is the complete commercial list: