When in company with literary women, make no allusions to 'learned ladies,' or 'blue stockings,' or express surprise that they should have any knowledge of housewifery, or needle-work, or dress; or that they are able to talk on 'common things.' It is rude and foolish and shows that you really know nothing about them, either as a class or as individuals.

The Behaviour Book: a manual for ladies (ed. 1839)