Your namesake Lewis Carroll, when he was writing, was high as a kite on magic mushrooms, and opium

As a change of topic, there is no evidence at all for that, as far as I am aware, though low level drug taken was common in that period. What is certainly true is people tend to seek an explanation for his imagination and in the flower-power era quite a few books were written as 'evidence' he was taking drugs. However, the documented evidence shows the Alice books evolving over quite a long time, beginning with a tale told while boating with the Liddell family, a pastime I do not recommend while high.

Lewis Carroll wrote a large body of work. One I recommend is a series of formal logic puzzles where the matters being reasoned about are every bit as imaginative as Alice, but need crystal sharp reasoning - not easily written while drugged out of your mind.