Both originals are reproduced below, with translations. Also an explanation of the history of registrations in the area during the XVII and early XVIII century is given, courtesy of the Archives Nationales du Québec and which I have translated in the non-official language.
Léonard Chaigneau was a sulpician priest and an "accountant". He had been the treasurer of the Sulpicians in Montreal since 1688. After 19 years in this role, on July 14 1707 he became the parish priest of Notre-Dame-de-l'Assomption-de-Repentigny. It is during this time that he served the area of Sorel as a travelling missionary as well. After a year he was called back to continue as treasurer in Montreal after the death of his replacement in July 1708. He died at age 48 on 23 Dec 1711. taken from the Canadian Dictionary of Biography.

"L'an mil sept cent huit le ving neuf de febvrier sont nés et ont été baptises a la maison, Jean et Jaques fils de Jean La vallée et Jeanne hu sa femme et le dix sept de mars Jay supplee les ceremonies de bapteme a Saurel, le parain de l'un a eté Jean chevalier, et la marènne Jeanne Baillargeon femme de Paul hu tous lesquels ont declaré ne sçavoir signe de ce requis L. Chaigneau"

The year one thousand seven hundred and eight the 29th of February were born and baptized at home Jean and Jacques sons of Jean Lavallée and Jeanne Hus his wife and on the 17th of March I supplied the ceremonies of baptism at Sorel. The godfather of one has been Jean Chevalier and the godmother Jeanne Baillargeon wife of Paul Hus, all have declared not knowing how to sign as required. L. Chaigneau

071 La-Visitation-de-la-Sainte-Vierge-Marie-de-l'Ile-Dupas. Western region of Lake St-Pierre.
The oldest register in the region is that of St-Pierre-de-Sorel (no 471). The acts presently kept start only in 1675, but Mgr Tanguay was able to consult other acts which have disappeared today, dating back to February 1669. This register is destined for Sorel and all "neigbouring places", a locution designating a vast territory: from Verchères (no 623) to St-François-du-Lac(no 631) on the South shore, from Lavaltrie (no 072) to St-Antoine-de-la-Rivière-du-Loup (no 331) on the North shore; to Chambly (no 103) to the South.
In 1679, all these "neigbouring places" are divided in two. Sorel continues to serve the eastern part, being St-François-du-Lac (no 631) (which will be separated in November 1687 taking Maskinongé (no 332) and Rivière-du-Loup with it), as well as Berthier (no 073), île-Dupas (no 071) and Lanoraie (no 074) also called Dautray. These last three parishes will stay attached to Sorel until September 1727. At that moment Sorel and île-Dupas start to keep independant registers. Lanoraie, Berthier et probably Lavaltrie share the same register until 1732.In November 1732, Berthier becomes independant. Lanoraie et Lavaltrie will stay together until July 1735, when each became independant.
Contrecoeur (no 621) becomes the center of the southwest portion, including Chambly which will be separated in 1706, followed by Lavaltrie in or before 1710. Lavaltrie shares a common registry with St-Sulpice (no 283) until 1727, when it becomes associated with Berthier and Lanoraie as mentioned above. Verchères has its own registry starting in 1727 and St-Ours (no 472) in September 1727; nevertheless between August 1702 and October 1750, the acts relating to the inhabitants of St-Ours are registered at Sorel and at Contrecoeur.

471 St-Pierre-de-Sorel
During the XVII and at the beginning of the XVIII century (until 1727), the registers of Sorel present two particularities. First, many books, preserved until the end of the XIX century and consulted by Mgr Tanguay, have now disappeared. Second, many books used jointly by Sorel, Île-Dupas (no 071) and Berthier (no 073), have been preserved only in one copy, in the name of either Sorel, or île-Dupas, and either at the ecclesiastical archives or civil archives; hence the remaining complete series can only be collated by consulting the four sources.