A medieval monk taught singers with the joints of one hand. You will use ten places on your body to keep ten things in order.

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Northern Italy, about a thousand years ago. In the choir school of a cathedral, a monk named Guido, from the town of Arezzo, has a problem that every choirmaster had. The great church chants had no written notes that anyone could easily read. A boy learned each melody by listening to an older singer sing it again and again, and it could take many years to learn enough to sing in church.
Guido wanted a quicker way. He is remembered for several ideas, but the one that lasted longest was strangely simple. He taught his singers to use the palm of their own hand.
On the left hand, every fingertip and every joint stood for a note, from the lowest to the highest. The teacher pointed at the joints one after another while the boys sang, and the boys learned to think of a note and a place on the hand as the same thing. Later they could do it silently. The hand was a map of sound that they carried everywhere, and no one could lose it or forget it at home.
Even the names of the notes came from a song. Guido used a hymn to Saint John whose lines began with the syllables ut, re, mi, fa, sol, la. Each line began one note higher than the last, so the singers could hear what each name sounded like. Those syllables are the ancestors of do, re, mi.
The 'Guidonian hand' stayed in music books for centuries, drawn in the margins of manuscripts and printed textbooks. People simply found it useful. It was always with them, it was a fixed order, and it was easy to touch while they thought.
That is exactly what we want from our first memory place. In this lesson you will not use a hand but your whole body: ten places from head to toe, always in the same order. They are the simplest possible memory board.
Say what you think each one means, then open it.
The Guidonian hand is traditionally linked to Guido of Arezzo (about 991 to after 1033). Retold here in our own words.
A peg is a fixed place you hang a picture on. If the pegs never change and always come in the same order, they can hold a list for you.
| Peg | Place | Peg | Place |
|---|---|---|---|
| 1 | Head (hair) | 6 | Chest |
| 2 | Eyes | 7 | Stomach |
| 3 | Nose | 8 | Legs |
| 4 | Mouth | 9 | Feet |
| 5 | Neck | 10 | Toes |
Brazil is not a picture. But Brazil sounds like bra. So you place a giant red bra across your chest (peg 6), with straps made of snakes. Russia sounds like rushing: a torrent of water rushes down your head. Hard words always turn into something. If one resists, pick any sound-alike.
Have a go before you open any answer. A rough attempt teaches you more than a perfect model you only read.
Say the answer first, then tap the card.
Put the first ten chemical elements on your ten body pegs, in order. Sound-alike hints: hydrogen = hydrant, helium = high voice or balloon, lithium = lit-up, beryllium = berry, boron = boring, carbon = car, nitrogen = night, oxygen = ox, fluorine = floor, neon = neon sign.
A picture for each, placed on pegs 1 to 10, head to toes. Then type them in order, one per line.
The list has gone. Type what you remember, one item per line.
These reach back to earlier rooms. Answer in your head or out loud, then check.
Where, in daily life, would a list of ten things be useful to hold for a day or two? (A shopping list, tasks, points for a talk.) How would you use the pegs?