note: RostirollaB, 741. Alternate cc. is ‘Aggio visto ‘l mappamondo’ [lappamondo], with musical setting. Text of ‘Purità’ found in Gall3 without a cc. (suggesting it was already associated with its own modo proprio setting), in R2929 (‘Povertà di Dio’), which was copied by 1448, and BML, Ashburnham 423, which probably predates the 15thc.
