The following are some book inscriptions found on old books warning book borrowers to return the books that they borrow:
Neither blemish this book, or the leaves double down,
Nor lend it to each idle friend in the town;
Return it when read; or, if lost, please supply
Another as good to the mind and the eye.
With right and with reason you need but be friends,
And each book in my study your pleasure attends.
If thou art borrowed by a friend,
Right welcome shall he be,
To read, to study, not to lend,
But to return to me.
Not that imparted knowledge doth
Diminish learning’s store;
But books, I find, if often lent,
Return to me no more.
Read slowly, pause frequently, think seriously, keep clean, RETURN DULY, with the corners of the leaves not turned down.
Hayes, Kevin J. (1997). Folklore and Book Culture.