In A Mad Tea-Party the Hatter and March Hare mistreat the Dormouse, as they
...were using it as a cushion, resting their elbows on it, and talking over its head.
(p. 95, original pagination for this and all subsequent quotations)
During the Trial, near the end of the book, Alice begins to grow in size, and thus to squish the Dormouse, who tells her:
I wish you wouldn’t squeeze so, said the Dormouse, who was sitting next to her. “I can hardly breathe.”
Whence the using of the Dormouse as a cushion, the resting of elbows on him, and the squeezing of this character?