The advertisement is featured in The Illustrated London News, May 10, 1924 (page 822].
‘Search the World
— and you will hardly find a tobacco so soothing at all times, so even in burning, so cool and dustless as Three Nuns. The curiously cut circlets, each in itself a perfect blend, are responsible for the uniformity of quality and fragrance for which Three Nuns is famous. Smoke Three Nuns and you will search no more.‘
The artist is unknown even though there appears a signature of sorts but it is difficult to read. Anyone who knows who the artist is I would be mighty appreciative in knowing.