Some Conversation Starters:

Insular Celtic: Ogam
https://www.academia.edu/44688399/Insular_Celtic_Ogam

Ogam
http://www.faculty.ucr.edu/~legneref...e/ogamscri.htm

Ogam: Ireland's Oldest Alphabet
https://armaghrobinsonlibrary.co.uk/...dest-alphabet/

Ogam (or Ogham) Markings: Ancient Celtic Stone Writings
http://web.cn.edu/kwheeler/documents/ogam01.pdf

Og(h)am: The Origins of Manuscript Ogam and Medieval Irish Grammatical Tradition
http://The origins of manuscript oga...ical tradition

Ogham
https://en.wikipedia.org/wiki/Ogham

Ogham Alphabet Meanings, History, and Divination for Beginners
https://www.thepeculiarbrunette.com/...for-beginners/

Ogham Divination
https://divinationlessons.wordpress....am-divination/

Ogham Symbol Gallery
https://www.learnreligions.com/ogham...allery-4123029