Question: How many books were illustrated each Christmas for eight years by the man who, along with Walter Crane and Kate Greenaway, was among the strongest contributors to the child's nursery motif for during the 19th century? 
Sentence (from "Randolph Caldecott"): Randolph Caldecott ( ; 22 March 1846 – 12 February 1886) was an English artist and illustrator, born in Chester.
Relevant evidence: Yes