[H]e alone knew how deep was the deluded man's chagrin at the failure of the little plot which he fancied was prospering finely.

much to the chagrin (of)

But since this Infidel Minister knows the folly of these Brags; which he sees destroy’d by the Relations Printed in other Countries: They serve only, for a Subject to augment his P…

[…] though you send at any Time, and even received an unmannerly Answer, do not let a rash Pride drive you to return the Affront, since it is impossible for you to know what at tha…