At least!
The total neglect of this art [speaking] has been productive of the worst consequences...in the conduct of all affairs ecclesiastical and civil, in church, in parliament, courts of justice...the wretched state of elocution is apparent to persons of any discernment and taste. If something is not done to stop this growing evil, English is likely to become a mere jargon, which every one may pronounce as he pleases.
- Thomas Sheridan, 1780