For his eastern history class, hamilton had to memorize a lengthy list of chinese emperors. to do so, he imagined each of them sitting in a chair in a different room of his family home. hamilton was using a technique called:

The technique that hamilton use is called the method of loci
the method of loci is a memorization technique that already discoeverd in ancient greek history,  Under this techniques, people will learn to create an imaginary palace inside our mind where we could store the informations according to our will