Re: What is a galley in this context?

In real, steam era printing technology, a galley refers to a steel tray used to hold metal type. A galley is used to store type and is placed in a galley rack that could hold 100 galleys typically, and the type in the galley could be put on a proof press and an inked copy of the type was "pulled" for reading purposes, back when there were people called proof readers. From the galley, the type would be made up into pages, then the completed page, with cuts and halftones, would be put on the press for printing. However, like many good traditional things, the computer era folks have taken this perfectly good term and have twisted it into something vaguely resembling its historic origins. This process of printing is called letterpress.
But Silver San Juan was composed and printed in the "in between" era of printing, after letterpress was pretty much obsolete, and before current digital technology came into being. The type was probably composed on a computer generated photo composing machine, photographic output in the form of Veloxes were then assembled into pages, halftones and line cuts shot on a process camera, and the resulting stripped up pages, in film form, were used to make the offset printing plates. And "galleys" made from the raw typesetting output were made on a copy machine, for the author to read, and maybe someone who could still spell and understood grammar. So, galleys used in this context is a total misapplication--what is probably missing are the page flats and plates. And, unless there is a specific agreement, a printer typically retains this material for only 30 days after printing before junking it. Such was probably the case with this book. The made up page flats were put together using either wax or rubber cement, and those types of material could be reused to reshoot the book, or now it would be scanned, but the adhesive material holding all this together fails after a few months. Prudent publishers, like Dell McCoy at Sundance, carefully store all this material for reprintings. That's why a book like the "Rainbow Route" is still being reprinted almost 30 years after the original publication.
Anyone who wants to see real galleys, galley racks, metal type, Linotype machines, etc., just needs to stop by my shop in Silverton where all this is still in use.