This could be the oldest poem or style of poetry, mentioning Wirral. possibly the second half of 14th century.
Extract taken from translated text of 'Sir Gawain and the Green Night'
Verse (30)
So this rider rode through the realm of Britain,
Sir Gawain in God's service: and to him it was no game.
He would lie down alone with no one to lead,
nor find before him any food that he liked,
Nor any help but his horse over hill and wood,
Nor any man but his Maker to make conversation --
till he neared the neighborhood of North Wales,
held all the isles of Anglesey on his left
and reached the river where its headlands rose
high near Holyhead, and held on across
through the Forest of Wirral. Few or none lived there
whom God could love, or a good-hearted man.
And he asked often, of all whom he met
if they could give him news of a green knight
or how he could get to the Green Chapel.
And they all said no, never in their lives
had they seen someone who was such a shade
as green.
The paths he would take were strange,
with little cheer to glean,
and his hopes would often change
till that chapel could be seen.
The whole is very long but very interesting, so I have provided the link.
http://alliteration.net/Pearl.htm
