Thank you François for remembering the dates of 1950 and 1956, I don’t remember where I found that few years ago…
About the ‘Cuña del Daiquiri’ one. In 2003, I didn’t had a later one so I though the date 1939 was right (so I dated the Negrone/Negroni that year… wich I realized later is was wrong, when I saw the ‘Constante’ one, also dated 1939, but impossible as color printing made it’s appearance during the 1950s.
Anyway it would be good to confirm the date of death of the author of that quote with the year changing up to 1939… I thought if was the year the journalist died. But I found in a book L.F.M (Lorenzo Frau Marsal) died in La Havana in 1947 (and was born in Barcelona in 1886). Strange…