The Celebrated "Moon Story," Its Origin and Incidents, with a Memoir of the Author, and an Appendix, Containing I. An Authentic Description of the Moon; II. A New Theory of the Lunar Surface in Relation to That of the Earth, by William N. Griggs.

HathiTrust Digital Library (record 000559375 provides full view of two copies.

The title page does not credit Richard Adams Locke, for the book or the "Moon Story" inside, but all of the preliminary contents by Griggs (pp. 1-45 in contrast to pp. 117-43) concern Locke by name.

U California and U Michigan book plates are affixed to both inside front covers, where university library endpapers would suggest the books has been. The outside front covers appear to be identical: nearly black cloth with relief design essentially illegible, but adequate to discern that they match.

If those covers are original, and "boards" rather than "limp leather", then this is a hardcover publication.