Because Ch.'s ms. (w/his usual seal "英 王堂藏書") is at the @NDLJP and has (long) been digitized. Inscription at end of both fasc.s, w/reference to Nishi: 此書者明治二十六年三月沖縄島順廻之砌首里役所長西常央之蔵書を借請謄写令しめし者也〔但し原本写本〕 > https://t.co/3JwxiP9aie