Aimé Paris (1798–1866) was a French scholar. He was the developer of a method of stenography, co-developer and propagator of what became the Galin-Paris-Chevé system of music notation, and possibly the inventor of the modern version of the Major System.
Paris studied mathematics and law, and became a lawyer. His techniques of memory were well known; at one point he was the "professeur de mnémonique" at the Athenée in Paris.
This is his number system (according to the French Wikipedia), which is the first known version of the Major System:
|0||c, s, z|
Download Paris' 1825 book on memory techniques, Expositions et pratique des procédés de la mnemotechniques, à l’usage des personnes qui veulent étudier la mnémotechnie en général here. A description of his system is on page 25: