In a rented car that brought us here yesterday the radio played a Vivaldi Psalm for alto, in several movements, called Nisi Dominus. But one of the movements isn't Vivaldi's, it's by Villa-Lobos. Sly fox: his famous fifth Bachianas Brasileiras isn't filched from Bach at all, but note for note from Vivaldi. Yes of course it's his too, like Borges's Don Quixote.I guess Rorem means the fourth movement "Cum dederit", from Psalm 126. Listen for yourself:
Rorem's Borges reference is to the 1939 story "Pierre Menard, Author of the Quixote", an early masterpiece of post-modernism.