Kay Nielsen (pronounced "kigh")(1886-1957)
was a Danish illustrator who was popular in the early 20th century,
the "golden age of illustration" which lasted from when Daniel Vierge
and other pioneers developed printing technology to the point that
drawings and paintings could be reproduced with reasonable facility.
He joined the ranks of Arthur Rackham and Edmund Dulac in
enjoying the success of the gift books of the early 20th century.
This fad lasted until roughly the end of World War II when economic
changes made it more difficult to make a profit from elaborately
illustrated books.