The word 'Hiraeth' has no worthy translation in English...but a close description would be: "an intense longing from the soul for 'home'. A feeling of connection to a place different from the place of sojourn." Homesickness in other words.
I love this wonderful Celtic word and this illustration in the 33 book would be dedicated to the feeling of deep affection I have for Wales. I love the countryside there and I love the spirit of the place. (Especially around Ynyslas in Dyfed).