Complex sentence: She donated her own considerable collection of Japanese and Chinese art books, and through her generosity the National Library was able to purchase further publications, in both English and Japanese, about western contact with and settlement in Japan for addition to the Harold S.Williams Collection.
Split into simpler sentences: She donated her own considerable collection of Japanese and Chinese art books. Through her generosity the National Library was able to purchase further English and Japanese language publications about Western contact with and settlement in Japan for addition to the Harold S.Williams Collection.