In this appendix form

[Antonio J.]

Hola. ¿Cómo se traduce "in this appendix form" en el texto siguiente?:I have asked him, however, before sending his proofs finally to the press, to allow me to make this small addition in order that I may say a few words upon these Indian occults of whom so little is known. In this appendix form, any reader is at liberty to neglect it; but should he be interested in the subject, I have endeavored to collect a little information for him.
Gracias por vuestra ayuda.

[gentle]

Yo iría con algo así como: "puesto de esta forma, como un apéndice, cualquier lector tiene la posibilidad de saltearlo/obviarlo..."