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The show includes a fragment from the 1459 Mainz Psalter, the second-oldest dated piece of printing from movable type in the West.

Curated by Barbara Heritage and Ruth-Ellen St. Onge, the RBS show displays items used in the school’s courses, including a scrap from the Mainz Psalter, all sorts of bookbinding tools, a two-sheet mold from the Wookey Hole paper mill, the lithographic stone that printed the cover image of the dime novel “Davy Crockett’s Boy Hunter” and even an old Rocket eBook.

In “The Mainz Psalter” a ship, hired by a supposed schoolmaster, sails from this world into another dimension or plane of being, where its crew confronts squid-like Lovecraftian entities and horrific elements adapted from William Hope Hodgson’s comparably unsettling short novel, “The Ghost Pirates.”

This spring, however, brings us “Cruise of Shadows,” which contains nothing but masterpieces, notably “The Gloomy Alley” and “The Mainz Psalter.”

It is impossible to suppose, however, that the Mainz psalter of 1457, which Lambinet points to as a specimen of this mode of execution, is the impression, not of type at all, but a collection of “casts” mounted on wood.