SB from Shropshire has asked me to warn readers about the cowpox virus.

Abbott warns readers that it "may be too difficult for anyone to solve."

He did warn readers that many suspected witches were really imposters, or unwitting agents of the devil.

A separate narrator, seemingly Sherwood, often interrupts the tale to warn readers against particular actions, such as becoming a "bad woman."

Here, Bellow warns readers against looking too deeply for symbols in literature.

I must, however, warn readers of this fifth chronicle to expect the unexpected.

This is good for him but not so good for me, and something you might like to warn other readers about.

Be warned, male readers: it's a jungle out here and you'd better have the right equipment if you are to survive.

He warned readers to stop reading if they did not want any surprises spoiled.

An email disclaimer may be used to warn unauthorised readers but these are thought to be ineffective.