I have no definitive answer about this last question, but :
- it seems like the first use of glagolitic was an epigraphic one (on stones, and not on manuscripts) : if one believe the latest research (and I do), the first manuscripts only appear in the 11th century
- within the very first manuscripts written in glagolitic, one was found on the... Sinai. It is the so-called Euchologium Sinaiticum (a photo here : http://www.schaeken.nl/lu/research/onli ... um_jpg.htm
) This, of course, would be a good point for Duncan's suggestion
- I had the same question than you, Duncan, and can promise you that there is absolutely no bibliography about the question ; many scholars were to fascinated by the personal influence of saint Cyril, inventing the slavic alphabet himself (which is a mistake I guess)
- nevertheless, we have to be aware that the similarities between amharitic and glagolitic can also come from common ancestors (the proto-sinaitic, which produced both amharitic and greek and, through the greek, the glagolitic). Remember that the greek, as written in the 9th Century, was very different of the greek alphabet we know today : there were many more letters, inherited from the archaic greek, and some of them are common with amharitic). You can have a look here :
http://fr.wikipedia.org/wiki/Lettres_%C ... habet_grec
(a french link, sorry ; but Wikipedia didn't translate it completely yet ; and you can at least see the appearance of the letters).
So I would suggest that glagolitic was born directly from the greek, even if we cannot exclude some later african influences through the Sinai or somewhere else.
What are the other opinions ?