IMG_0012At the end of the third line of the third stanza of this the 1961 Penguin Swinburne, you can see a word space between the last two words. In Monotype setting the word space was a separate piece of lead which should have fitted down between the o and the h. This one got loose at some point and rose up till it was type high. Thus it got inked and printed. This was a not altogether unusual occurrence — the pressman probably noticed it quickly, unlocked the form, beat the errant space down, and resumed printing.

Note also that this paperback was smith-sewn, even though it was printed on groundwood paper.