New numerals?

When ꖝꔞꔒ [sic?] invented/formalised the ꕙꔤ script he and his assistants for some reason didn’t create numerals. Maybe they just didn’t think of it, as numbers could be represented in words. Almost a century later numerals were developed for 0-9, but never caught on. The two reasons they didn’t get accepted I imagine is that …

How did this get started?

Some years ago, I was in New York, visiting my brother. One day we went to the local library and he found a book called A grammar of Vai (or something similar as I could recall) and as our old family name comes from Vai we decided to look it up. Unfortunately we couldn’t borrow …