2017-12-17, update: 2019-02-17
But perhaps Holiday’s ruff – and the pose of the Fit Five drawing – was inspired by the Elizabethan drama inherent in Millais’ Boyhood of Raleigh, (1869).
Louise Schweitzer, One Wild Flower (2012)
2017-09-04, updated 2019-01-05
Playing with the work of other artists could have been fun for John Tenniel too. (Of course another reason for the similarity simply could be, that the designs of the train compartmens are similar.)
Bycatch (but not mine):
[left]: John Tenniel: Alice on the Train (1872)
[right]: Augustus Leopold Egg: The Travelling Companions (1862)