No births, no marriages, and no deaths were recorded. The proverbial brick wall. The Petrys were Roman Catholics. In this case the records created for births that took place in the State of Vermont are to be found in another country, in another language, and sometimes filed under another name. If you are not familiar with the area this would be a difficult mystery to unravel.
Civil registration is a very recent development In Quebec.
The clergy have been responsible for vital record keeping for 350 years. Of course the Petrys are not an exception. Early R.C. records at Stanstead show many births, marriages, and deaths of Vermonters entered there. The earliest members of this church were Irish and English Catholics. The same situation affects their family researchers as well.