Cailleau served as the prefect of what is now the Roman Catholic Diocese of Tambacounda in Senegal from 13 August 1970 until 24 April 1986.
[1] He was ordained a Catholic priest of the Holy Ghost Fathers on 1 October 1950.
[1] He died as the prefect emeritus of Tambacounda on 21 July 2011, at the age of 87.
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