In illo tempore loquente Jesu

Written about 1538. 
The only copy found was an Eulenburg score. No. 990. 
This version is for recorders. 
The Finale 2008 version includes the six parts, although the versions provided have been reformatted. 
In Bar 38, the Alto 2 part goes down to an E4. An alternative G4 has been indicated at this point. The
  tenor part has been changed for this note too. The original has a C4. An alternative E4 is indicated.