He worked with Peter Canisius on the mission to reclaim German Protestants to Catholicism.
[1] Goudanus went on a covert diplomatic mission, under instructions of the end of 1561 sent by Alfonso Salmeron, via Everard Mercurian.
[2] He was accompanied by Edmund Hay and Jean Rivat as interpreters,[1] and had a meeting with Mary Queen of Scots, as papal legate, at Holyrood Palace.
[4] The Queen turned down a request to send Scottish representatives to the Council of Trent, then winding up.
[5] Only one of the Scottish bishops, Robert Crichton, was prepared to give him an interview;[6] Henry Sinclair was instructed to meet Goudanus by the Queen, but refused.