Hi all:
I can never seem to resist a puzzle - so thought I'd give this one a try.
To me it looks like his name is H. Grispini
If the word Bariton is actually baritone then possibly its not just a spelling mistake but its written in a different language. A quick look through googletranslate shows 'bariton' translates to 'baritone' in Albanian, Azerbaijani, Croatian, Dutch, Estonian, German, Haitian Creole, Hungarian, Romanian, Slovenian, Turkish, and Welsh. The majority of those languages are eastern European which may give some insight into his background.
Also wondered if the word Bariton was a place name - and wondered if Solo was actually Tolo. I didn't get anywhere with Bariton locations but there is a small town named Tolono in Illinois.
Didn't solve anything, but it was fun to think about
