In March 1958 Tolkien was the guest of honour at a “Hobbit Meal” in Rotterdam, Holland. He had never before accepted such an invitation and never did again. By interviewing the organisers and many people who met Tolkien, the visit has been reconstructed, and many, often funny anecdotes have come to light.
van Rossenberg, René
"Tolkien's Exceptional Visit to Holland: A Reconstruction,"
Mythlore: A Journal of J.R.R. Tolkien, C.S. Lewis, Charles Williams, and Mythopoeic Literature: Vol. 21
, Article 45.
Available at: https://dc.swosu.edu/mythlore/vol21/iss2/45