The redaction of the first Code of Canon Law that held by the Latin Church was ordered by Pope Saint Pius X in 1904. The coding task, however, was not the work of a closed group of experts, but took into account the views of the episcopate, which was asked at two different times, in both the Latin American bishops were consulted. In this paper we study, from the documentation kept in the Vatican Secret Archives, the contribution of the Latin American bishops on marriage, in the first survey conducted in 1904.