Another milestone was the opening of the building on Mexico Street (in the Montserrat ward) in 1901, a building which was originally designed for the National Lottery. This is the reason early visitors unfamiliar with the story of the building were commonly surprised when walking a staircase adorned with lottery-ornaments. During Groussac’s forty-year administration the library’s patrimony was also enriched with many important donations including Angel Justiniano Carranza‘s personal collection, 18,600 volumes from the nineteenth-century legal expert Amancio Alcorta, and Martín García Merou’s collection - which included valuable papers regarding the foundation of the city of Buenos Aires. Ironically, just as the former director Mármol and the future director, Borges, Groussac developed blindness. He still operated as the National Library’s director for some years before dying in 1929.