The contents of Ford Prefect’s satchel were quite interesting in fact and would have made any Earth physicist’s eyes pop out of his head, which is why he always concealed them by keeping a couple of dogeared scripts for plays he pretended he was auditioning for stuffed in the top. Besides the Sub-Etha Sens-O-Matic and the scripts he had an Electronic Thumb—a short squat black rod, smooth and matt with a couple of flat switches and dials at one end; he also had a device that looked rather like a largish electronic calculator. This had about a hundred tiny flat press buttons and a screen about
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