Martorell Collection, Library of Congress

"In 1910, the Music Division [of the Library of Congress] purchased an extensive collection of copyist music manuscripts that we believe were once owned by the family of Alonso Tomás Álvarez de Toledo y Silva (1835-1895), X Marqués de Martorell and his wife Genoveva Samaniego y Pando, VII Marquesa de Casa Pontejos....The largest subset of the Martorell collection includes 253 uniformly bound volumes comprising well over 1,100 full scores of excerpts predominantly from 18th-century operas."