Paperback. From the collection of Adolf Grünbaum, the first article inscribed 'For Adolf, with warm regards, Peter' and the others unsigned. The typescript (a photocopy) appeared in Stephen Korner's anthology 'Explanation' in 1975.

Baltimore: The Johns Hopkins Press, 1968. Hardcover. Octavo, brown cloth covered boards in DJ, 266pp. Book is very good plus with general shelfwear to boards, black remainder mark on bottom edge of text block, text clean and unmarked, binding tight. DJ is very good plus with general shelfwear and rubbing.....

Oxford: Oxford University Press, 1971. Hardcover. Hardcover with blue cloth boards in dust jacket, 1971, octavo, 168pp., sparsely illustrated in b&w. Book VG+ with mild wear to spine ends and corners, binding tight, philosopher Peter Machamer's signature to front flyleaf, otherwise text clean and unmarked. DJ good with soil, joints.....

New York: Oxford University Press, 1983. First Printing. Hardcover. Publisher's dark blue boards, no jacket, inscribed by Achinstein to Salmon and with Salmon's bookplate. Text with several marginal marks in ink by Salmon and some underlining, and one pencil comment at the end of a chapter: Salmon is cited multiple.....

United Kingdom: Basil Blackwell, 1969. Softcover. This issue only! Printed paper wraps, octavo, not illustrated. Book has faint creasing to spine, mild sun to front panel, mild rubbing, binding tight, text clean and unmarked.