Archdeacon Pawley, an Anglican Observer, reveals that “In the course of the Council itself the fullest courtesies and opportunities for communication and exchange were allowed to the Observers at every stage, and traces of the process can be recognized in the documents themselves.” - B. Pawley, Rome and Canterbury through Four Centuries (London: Mowbray, 1974). p. 343.
Robert McAfee Brown, a Presbyterian Observer, remarks:
Particularly, during the discussion on ecumenism, it was apparent that many bishops wanted to know what Protestant reactions were to the statements in the schema about Protestantism, and wanted to elicit Protestant opinions on how the schema could improved. Thus, although we had no direct “voice” on the Council floor, we did indeed have an indirect voice through the many contacts that were possible with the Fathers and their indispensable strong right arms, the periti. - R. McAfee Brown, Observer in Rome (London: Methuen, 1964), pp. 227-228.