A Certain Dr Thorndyke by R. Austin Freeman

IN a small street hard by Clerkenwell Green is a small shop of antique and mouldy aspect, the modest window of which is so obscured by a coat of paint on the inside as to leave the unaided observer to speculate in vain as to the kind of wares concealed within. A clue to the mystery is, however, furnished by an inscription in faded gilt lettering on the fascia above, which sets forth that the tenant's name is Lambert and that his vocation is that of a lapidary and dealer in precious stones.

On a certain afternoon a few days after his interview with Mr. Penfield, Dr. John Thorndyke might have been seen to turn into the small street with a brisk, decisive air suggestive of familiarity with the neighbourhood and a definite purpose; and the latter suggestion would have been confirmed when, having arrived at the shop, he pushed open the door and entered. A faded, elderly man confronted him across the counter and inquired what might be his pleasure.