Ngasilake versi sing luwih rumit saka ukara iki'' Occasional Issues of Unique and Very Rare Books'(1875 - 1881) minangka kapentingan sing paling penting kanggo para penyayang buku.
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "His '' Occasional Issues of Unique and Very Rare Books'(1875 - 1881) kalebu ing antarane liyane yaiku '' Annalia Dubrensia '' Robert Dover. "