“When I use a word," Humpty Dumpty said in rather a scornful tone, "it means just what I choose it to mean - neither more nor less.”

Lewis Carroll has a unique style that he created. His backgrounds in mathematics and logic have a lot to do with the style he chose. Other influences for his writing could have been his interest in photography, abnormal eating habits, dual personality, sleeping difficulties, Victorian lifestyle, and neglected childhood. Most of his stories center on ideas similar to these. Although well known for his Alice stories, Carroll didn't only write in prose, he wrote many poems and shorter pieces. Carroll had a negative association with eating. He would normally skip lunch and ate very little for dinner. In most of his stories food is associated somehow. In Alice in Wonderland, eating and drinking makes her change size rather drastically. Eating is associated with sin as far back as Adam and Eve. Alice is tempted to eat the Queens tarts while in Wonderland, which she knows to be wrong. Even the Chesire Cat is associated with eating as a sin. The last part of him to disappear and the first to reappear is his mouth. Split personality is present in his stories. Lewis Carroll himself has a split personality of sorts. In Alice in Wonderland, Tweedledee and Tweedledum are twins who are constantly contradicting each other's opinions. Also as Alice falls down the rabbit hole, the top becomes the bottom and the bottom becomes the top.
Lewis Carroll uses a lot of rhyming, alliteration, personification, and imagery in his stories. He creates these magical worlds that he then has to explain in a way children can understand. By using these techniques, he keeps the audience's attention and they are able to immerse themselves in the words. He also uses a lot of parentheses, Italics, and capital letters. This makes the text a little more exciting and doesn't tire ones eyes as fast. It gives it a somewhat unprofessional look to it, but he was writing for children, not scholars.

sources:
http://aliceproject5.wordpress.com/2009/10/29/the-peculiar-writing-style-of-lewis-carroll/
http://www.essayforum.com/essay-writing-feedback-3/lewis-carroll-biography-style-literary-devices-2342/
http://www.pazooter.com/carroll/lcbio.html