[_OEuvres (Memoires),_ ii.

92, 93; IB.i.

143; Preuss, ii.

84.] The Dates, much more the features and circumstances, all lie buried from us, and--till perhaps the Lamentation-Psalms are well edited--must continue lying.

As a fact certain, but undeniably vague.
Voltaire's procedure, one can gather, is polite, but two-faced; not sublime on this occasion.