Diderot throws out the curious hint that it would be best to forbid any writing against government and religion in the vulgar tongue, and to allow those who write in a learned tongue to publish what they please.

And so we bid farewell to Aius-Locutius.

In passing, we ask ourselves whether Diderot's suggestion is not available in the discussion of certain questions, where freedom of speech in the vernacular tongue is scarcely compatible with the _reverentia quae debetur pueris_?
Diderot is never prevented by any mistaken sense of the dignity of his enterprise from interspersing his disquisitions on science and philosophy with such practical thoughts on the common matters of daily life as come into his ingenious head.

He suggests, for instance, by way of preventing the frauds of cab-drivers on their masters and on the public, that all payments of fares should be made to appointed officers at the various cab-stations, and that no driver should take up a fare except at one of these stations.[175] In writing about lackeys, after a word on their insolence and on the wretched case in which most of them end their days, he points out that the multitude of them is causing the depopulation of the fields.

They are countrymen who have thronged to Paris to avoid military service.