Codex Escorial Chansonnier E-E MS V. III. 24(ca.1430 - 1445)
Palacio Real, Monasterio de S. Lorenzo, El Escorial, Madrid, Spain
Biblioteca del Monasterio Escorial
Contents list is in DIAMM -> here
This Codex isn't in Online. I used modern Fascimile edition published by Bärenreiter in 1958.
No.1 "Se mon cuer a hault entrepris"(Anonymous)
No.2 "Je vous salue. ma maistresse"(Anonymous)
http://aeolianconsort.chakin.com/Codex_Escorial.htm