Figure 3 summarizes the family tree of the early Perys and Perrys as reconstructed in the early nineteenth century for the first earl of Limerick by Sir William Betham, Ulster King of Arms. This table is useful in showing the relationship of the London and Limerick Pery/Perry families, their common origin in Exeter and their probable (possible?) derivation from the Pery family of Water. However, it leaves unexplored the relationship of these families to the Pery/Perry families of Plymouth, Buckland Monachorum and Virginia who are mentioned or suggested as their kin in surviving records.
It is really not possible in the 1990s to conduct a totally rigorous critique of the work of Sir William Betham, inasmuch as several major bodies of records used by him are no longer in existence. Most Irish wills and many other records were destroyed when the Four Courts were blown up during the "Troubles" of 1922. Most Devon wills were concentrated at Exeter and destroyed by aerial bombardment during the Second World War. We also do not know exactly what family records were made available to Betham by the first earl of Limerick. More recently, the late earl of Limerick deposited most of his early family papers in the National Library of Ireland, where they have not yet been catalogued. Some sixteenth and seventeenth century items shown in an inventory prepared for the earl prior to the transfer cannot now be located, though it is hoped that the missing material will turn up later when the cataloguing of this deposit is finished.
Nevetheless, it is possible from the annotations left by Sir William Betham to reconstruct the chain of inductive reasoning he employed in making the early family tree. He knew that the first William Pery of Limerick in his will (proved 1633) remembered his cousin Richard