supererogative

Ryley's conjecture, that this use of the term Abigail had any relation to the Lady Masham, is, therefore, quite supererogative—but I may go farther.

"That was last October," he answered with a sing-song weariness suggestive of impatience at such supererogative explanations.

The second line is supererogative in syllables, whether from the oscitancy of the transcriber, or from the trepidation which might have overpowered the modest Frenchman, on finding himself in the act of writing to so 'great' a man, I shall not dare to determine.