I started to post it, but think it's better as a link. It's not nude, but it's clear, at least to me, that the photographer was attracted to the subject. Carroll used to do child nude photography, although at his death, he left in his will that these photos be returned to the subjects or destroyed. There's no evidence he ever molested children, but there's little doubt that he was sexually aroused by young girls to the exclusion of sexual attraction for adult women. As a scholar, his specialties were math and logic, although he also was interested in magic tricks. These preoccupations also show up in his work, in the absurdist logic exercises, and "magic" sequences. He used the magic tricks to attract young girls while he was out at the beach or on cruises. Many of these girls became his photo subjects.
The Alice books are a mixture of his fascination with magic tricks, mathematics, logic, and his sexual attraction for young girls. As such, it's not surprising you found it impenetrable, since it's doubtful you share Mr. Carroll's interests, if you get my drift.
And it explains why it's the Liberal's Bible. ;-)