Goídelc / Old Irish

www.celtic-languages.org/Old_Irish/Resources - Old Irish resources, books, etc.

www.celtic-languages.org/Old_Irish/Guide_to_Old_Irish_spelling - Guide to Old Irish spelling.

www.omniglot.com/language/numbers/oldirish.htm - Numbers in Old Irish.

omniglot.com/language/numbers/celtic3.htm - Numbers 1-10 in Primitive Irish, Old Irish, and Classical Gaelic.