speak slightingly of

References in classic literature ?
Now, if I were to hear anybody speak slightingly of you, I should fire up in a moment: but that is not at all likely, for you are just the kind of girl to be a great favourite with the men.
They could exchange their views concerning the Duke of Wellington, whose conduct in the Catholic Question had thrown such an entirely new light on his character; and speak slightingly of his conduct at the battle of Waterloo, which he would never have won if there hadn't been a great many Englishmen at his back, not to speak of Blucher and the Prussians, who, as Mr.
Hattersley, for I want to think well of him; and though I have spoken against him myself, it is for the last time: hereafter, I shall never permit myself to utter a word in his dispraise, however he may seem to deserve it; and whoever ventures to speak slightingly of the man I have promised to love, to honour, and obey, must expect my serious displeasure.
The following year, Oscar Wilde's Miss Prism lamented the tendency of the younger generation to speak slightingly of the three-volume novel.