## Lewis Carroll’s Memory Techniques

Charles Lutwidge Dodgson (a.k.a. Lewis Carroll, author of Alice’s Adventures in Wonderland) practiced memory techniques. His memory system has some similarities with the Major System but seems more complicated in its letter choices:
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## A 4-Digit System for Memorizing Numbers

A few days ago, I wrote a post about a comparison I did of different memory systems when I was deciding on which memory system to use.  I went with the 3-digit Ben System for a few different reasons. For decimal digits, having 1,000 images seemed like a good balance between compressing data and manageability.  A 4-digit system with 10,000 images would compress more digits into each locus but seems like it would be difficult to develop and use in practice.
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## Person-Action vs. Person-Action-Object vs. 3-Digit Systems

When I was deciding on what kind of memory system to use, I made a chart to compare the efficiency of different systems.
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## New Memory Flash Cards

I’m frustrated with some elements of my current system, and inspired by the recent World Memory Championships, so I’ve decided to try to move from my two digit number system to my three digit number system as soon as possible. I asked a printing shop to cut up some card stock into 1,200 business-card sized pieces.
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## The Meanings of Numbers

I compiled all of the pages about numbers 1 to 100 from Wikipedia into a single PDF document. Wikipedia has many ideas for number associations. Here are some examples for the number 3:
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## Arbitrary Actions or PAO? (Part 2)

I made some progress today on the 2-digit/single-card part of my memory system. Yesterday, I was wondering whether I should switch to a person-action-object (PAO) system for my 2-digit numbers, or stick with just a collection of characters and objects.

I started changing the images to a PAO system but wasn’t feeling inspired about it. I decided to mark each object with a suggestion for actions depending on whether it comes before or after another image.
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## Arbitrary Actions, or Person-Action-Object?

My memory system is based on Ben Pridmore’s but with a few modifications. The core idea is the same though: decimal digits are chunked in 3s, binaries in 10s, and cards in pairs. I also have a 2-digit system and a single-card system because I don’t think I will have my 2,652 double-card images ready by the USA Memory Championships in March.

One thing that I’m trying to figure out is whether it’s worth converting my two digit system into a person-action-object (PAO) system. I sometimes have trouble creating a wide enough variety of actions to go with my characters and objects.
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