How the list was actually used
The best account comes from inside the city. Matilde Serao devoted a chapter of Il ventre di Napoli in 1884 to the lotto, and she describes the smorfia not as a book people owned but as something they knew by heart. Every Neapolitan who could not read, she writes, knew the key to dreams from memory and applied it instantly to anything at all.
Her worked example is the clearest description of the method anyone has left. You dreamed of a dead man? Forty-seven. But he spoke? Then forty-eight. And he was weeping? Sixty-five. And it frightened you? Ninety. A young man knifed by a woman gives 17 for the misfortune, 18 for the blood, 41 for the knife, 90 for the crowd. Nobody looked up one word. They read the whole scene and came out with a line.
The code went further than betting. To call a man mad you said è nu vintiroie, he is a twenty-two. Serao reports an assault case in which the defendant explained herself to the magistrate with m'ha chiammata sittantotto, she called me a seventy-eight, and the judge had to send for a smorfia to find out what was offensive about the number.
None of which Serao thought charming. The chapter is an attack: on families who staked the rent every Saturday because tradition required it, on the cabalistic weeklies sold to the credulous at ten lire a year, and on what the city did to monks it believed knew the numbers. Anyone quoting her dream sequence as a piece of colour is quoting the wrong half of the page.