This book by the Rev Murray Mathew was the first comprehensive review of birds in Pembrokeshire. It relies heavily on the Reverend's own observations and interpretations, those of a few acquaintances of his, and those from some local taxidermists.
The whole text is available to read online or download as a PDF
Only the species accounts are reproduced in this avifauna (click here to see them all - or on "Mathew" under tagged, below), there is more information in the book itself.
Note that species names are given as Mathew used them, and therefore are not always the same as in current use.