Djwebb your font is so beautiful... Is this the Irish letter system before it adopted the Latin alphabet?

Yes. This is called Seana-chló, the old font. But I like to call it Gael-chló, the Gaelic font.

Is fíor sin, ach is fusa samplaidhe a dh’fhaghbháilt in abairtíbh ina bhfuil fochlásail: deir sé gur Pádraig ainm a mhic, deir sí gur Máire a bhí uirthi srl. – tá an chopail le feiscint iontu i gcomhnaidhe agus ní minic a bhíonn an forainm ann más cainteoir dúthchais a deir iad.

It's difficult to even understand why the people "in charge" in Dublin were so insistent that the Irish font could not be retained. At one point, if native speakers sent in manuscripts of books to be published by An Gúm (an Irish government publishing body that produced thousands of Irish books), they lorded it over the native speakers in the Gaeltacht, and told them they would not accept handwritten work, and would only accept typed manuscripts, and the Seana-chló would only be used if the native speakers sent them in, typed, in that font --- knowing that typewriters for typing in Seana-chló didn't exist. The way they treated native speakers was simply abysmal. I was told by a seanchaí in Muskerry, who died a few years ago, that he did not accept the new spelling, the new font or the Official Standard!!! When I started learning Irish, I was told online, on Daltaí, by people like Dennis King, that no native speakers opposed the new spelling, the Roman font or the Official Standard, and only foreign learners online did. It turns out that this was simply untrue.

Tá an ceart agat.

Are there Bibles written in this font/spelling? Are there textbooks teaching Irish in this font/spelling? What would you recommend?

I'll continue working through Teach Yourself Irish, but I'd also like a book teaching Irish via this font/spelling.

Nearly everything published before the 1950s is in the Gael-chló. See for example https://archive.org/details/introductio ... ew=theater, which is Gerald O'Nolan's textbook. The PDF is at https://archive.org/download/introducti ... st00nu.pdf

See also Norma Borthwick's Ceachta Beaga Gaedhilge: https://archive.org/details/ceachtabeag ... ew=theater

The Bible was also usually in the Gael-chló too, .e.g. https://archive.org/details/tiomnanuadh ... 5/mode/2up I think around 1817 they did publish a Roman script edition of the Bible too. (The Gaelic script Bible also contains scribal abbreviations, e.g. a line over an n would indicate a double n. There is a Bunchló font that contains these abbreviations too. You can find it online - Bunchló na Nod.)