Question: What name did the leading English art critic of the Victorian era give to a series of letters addressed to British workmen during the 1870s?
Sentence (from "John Ruskin"): John Ruskin (8 February 1819 – 20 January 1900) was the leading English art critic of the Victorian era, as well as an art patron, draughtsman, watercolourist, a prominent social thinker and philanthropist.
Relevant evidence: Yes