Phil, this is amazing. Looked at the links you gave me; the book about the Royal Irish Rifles quoting from the War Diary for 6th September 1918 states that N.36.d was in Mortar Farm. It appears on the first link you sent me to the left with names like Nutmeg and Ugly within. Directly below is Boyle's Farm which is also mentioned in the War Diary for that date with trench T.6.b being referred to. Essentially appears to be the area were the bible was found. Absolutely delighted with this information.
If you ever need any assistance locating anything in Ireland let me know and I will do my utmost to return the favour.
Can not thank you enough for this...
Derek