The only one of these diagrams that I’ve been able to find is called ‘Fionn’s Window.’ I’ve also seen it called ‘the Feige Find.’ It’s been theorized that Fionn’s Window is a symbolic depiction of Celtic Cosmology. I’ve laid out a set of Ogham symbols in the pattern of ‘Fionn’s Window’, hoping to glean some insight into this mysterious alphabet, but alas, the deeper mysteries of this divination system elude me. For the curious, I am posting the Fionn’s Window diagram below:

The Ogham resurfaced in Robert Graves’ early twentieth century classic, The White Goddess, wherein he devotes at least two chapters to Ogham folklore. Critics have dismissed Graves’ book as more poetic speculation than reliable historical fact, but it brought fresh attention to the Ogham and contributed to the birth of modern Paganism, particularly Goddess spirituality and Wicca, and is well worth a read.
Because I’ve had a harder time connecting with the Ogham than other symbol systems, I developed an Ogham card deck with the training-wheels still on it, which I call The White Tree Ogham Deck. The link appears below. These cards show the Ogham stave, give the associated meanings, and include an illustration of the related tree or plant.
As always, the last page of this PDF includes a card-back design, so when you print them out, skip the last page if you want to substitute your own design on these cards.
So let’s look at each individual Ogham few. The Ogham alphabet is divided up into five ‘aicme’ a word which translates as ‘tribe.’ Each aicme consists of five Ogham letters.

Hands down the best explanation for Ogham I’ve found. It was extremely helpful and I’m happy to have found your site.
I tried to keep the Ogham lesson as factual and uncomplicated as possible, while still doing some justice to the subject. I’m glad you find my site helpful!
I would like to suggest another well researched, more scholarly reference for your readers, “Ogham: The Secret Language of the Druids, by , Rev. Robert “Skip” Ellison. This book was instrumental on helping me with a basis for my divination practice. It is nice that the book is available in both paperback and Kindle versions.
Ellison, Rev. Robert “Skip”. Ogham: The Secret Language of the Druids.
Tuscon, Arizona: ADF Publishing. Copyright 2008, 2014. ISBN:
097656811X ISBN13: 978-0976568117 (Kindle ASIN B00J2EIO26)
“This solidly researched guide to Ogham, the traditional alphabet of Irish poets and loremasters, belongs on the bookshelf of anyone interested in Celtic traditions or modern Druid spirituality. Ellison deserves high praise for a readable and practical introduction to the intricacies of Ogham lore.” — John Michael Greer, author of The Druid Magic Handbook
Rev. Skip Ellison has been a member of Ár nDraíocht Féin (ADF) since 1990 and has served on its Mother Grove since 1992. He has held several positions including Chair of the Clergy Council, past Chief of the Magician’s Guild, and is an Archdruid Emeritus of ADF. Rev. Ellison can be reached at: sellison@twcny.rr.com, and his web site can be viewed at http://www.dragonskeepfarm.com.
There is also a free app for Android phones in the Google App Store, Oghamantis, by Rob Henderson, based on this work. (https://play.google.com/store/apps/details?id=oracle.ogham) I find this app to be quite useful, as it enables me to have both the Ogham and a quick, if abbreviated, reference with me any time I have my phone. I still prefer the staves I prepared using the wood of the trees each few represents, but for a quick reference it’s hard to beat.