The 'old' pics of PI show it fence off and they are in sepia(ish).

The stone circles:
http://www.gtj.org.uk/subjects.php?lang=en&s=2018

Chambered tombs:
http://www.gtj.org.uk/subjects.php?s=2534&lang=en&srch=&pg=1

The pre-Christian section:
http://www.gtj.org.uk/subjects.php?lang=en&s=42

Another site of interest while we're on Pembs:
http://www.jbgallery.co.uk/page4.html

I bought the PI one for Vicky for her 30th from Castell Henllys.

Cheers

G