Brother Bertrand Durcournau is responsible for much of what we know about Vincent de Paul. He became Vincent’s secretary in 1645 and preserved as much as he could of what Vincent wrote and said. Durcournau urged the transcription of Vincent’s conferences and copied the transcripts. He saw to it that Vincent’s letters about his Tunisian captivity were preserved and copied. He gathered details about Vincent’s early priesthood and assisted Louis Abelly in writing Vincent’s biography.
Poole, Stafford C.M.
"Brother Bertrand Ducournau,"
Vincentian Heritage Journal: Vol. 6
, Article 5.
Available at: https://via.library.depaul.edu/vhj/vol6/iss2/5