The English Hymnal (1906) has all its Gregorian hymns in square notes. Veni creator is no. 154. Veni sancte Spiritus is no. 156.
Sir Sydney Nicholson's A Plainsong Hymnbook also has these. Sir Sydney's book is a true trove and if one is spotted it should be snatched up. I believe that it is available from Amazon.
English Hymnal almost always uses the Sarum form of chant. Could cause a sensation if that is not the anticipated version. Also, text is NOT underlaid. And, for those who care about such things, the translations are largely antiquarian.
Father Samuel Weber OSB has the Latin Text like that for vs. 1-4 pdf pg.178, and vs. 5-7 pdf pg.180 for the monastic version, the Roman version I think is just a few pages back.
For the 1632 text with no rhythmic markings or extra notes for elisions, paste the attached text file into your preferred online editor, such as the Source & Summit Editor.
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