In 2019, a collection of his watercolour paintings for stamp and banknote designs was sold at auction after being found in a wardrobe 40 years after his death.

[12] Working in watercolour with the aid of a magnifying glass, Fryer produced a stamp-sized impression of the proposed design.

If approved, a larger original was created at a higher level of detail that formed the final artwork from which the stamp would be printed.

[14] Fryer also worked freelance as shown by a c. 1910–20 calling card describing him as the designer of "Ornament Bookplates Vignettes" at his "private studio" at 18 Cheapside in the City of London.

In 1957 he was trading as Fryer and Scott when he submitted an invoice for expenses incurred in a visit to the Austrian State Bank Note Printing Works.