I find in a mid-16th century Spanish printed publication the use of two lower case r's. See attached PNG. "El tercero libro" demonstrates this where a fairly standard lower case "r" is used int "tercero" whereas in a different character is used in "libro".
Does anyone know the context in which one is chosen instead of the other?
Does anyone know if this is a common or historic convention and if a particular Unicode character would be used for this today?
I find consistant usage of each character in words that are repeated but cannot decipher a rule regarding usage either by proximity to consonants or vowels, beginning or ending of words or syllables, use in nouns or verbs, etc, etc. Perhaps it is related to pronunciation but I can't establish that since I don't speak Renaissance Spanish.