A question about a quote from "Alice in Wonderland"

I think you are overestimating the dormouse's attention span. It does not connect "they were learning to draw" with Alice's question "but what did they draw?" and just gives an answer fitting Alice's question without context.

The whole point of that scene is that the dormouse is half asleep and spitting out random but related words when cued/prompted, and the Hatter and March Hare construct a gospel from it which they feed Alice with increasing agitation while insisting on its coherence.

Basically, it is a satire on divination and mysticism or other exegesis, similar to Monty Python's "follow the sandal" scene.