Choral Public Domain Library

Can someone help identify this hymn http://www.youtube.com/watch?v=5cfj8RoZKLU ? I tried to listen to a number of other versions, but have not been able to find another one with the same music and the composer's name.

Hi, it's the O Salutaris Hostia from Messe à Trois Voix by André Caplet:

http://www.youtube.com/watch?v=Iavb5mnQl9Y
http://www.youtube.com/watch?v=nwsr134mvrU

A free score is available on IMSLP:

http://imslp.org/wiki/Messe_(Caplet,_Andr%C3%A9)

You have a very good ear. I had listened to http://www.youtube.com/watch?v=Iavb5mnQl9Y but had not been able recognize the music as it is so slow with a long silent between the first too words. Thank you very much.