on no account

But, however, concerning philosophies of this kind, a caution was on no account to be overlooked ; because already we foresee it in mind, and augur, that if at any time, stirred by our admonitions, men (taking leave of the sophistical learning) shall, in earnest, shape themselves to experiment, then will it certainly happen, on account of the premature and overhasty speed of the mind, and its spring and flight to generalities and the principles of things, that there will be an imminent danger from such philosophies; and this evil it is fit even now to meet.

1844, Francis Bacon, James Glassford, Novum Organum Scientiarum, Edinburgh Print Company, pages 50-51

“Why didn't the idiot tell her not to open it?” “It was his first move. ‘I've found a letter from you here, precious,’ she said. ‘On no account open it, angel,’ he said. So of course she opened it.”

1960, P[elham] G[renville] Wodehouse, “VIII AND XII”, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC