| After Proposition VII of book one, since it is a problem, Newton
| writes Q.E.I. for that which was to have been found.
Not always with that meaning! For instance, at the end of corollary I
(Pt I, Bk I) of _Euclides ab omni naevo vindicatus_ ["Euclid vindicated
from all blemish"], Gerolamo Saccheri closes his sentence with:
"Quod erat intentum" [What was asserted].
In certain translations of the same page, the expression "quod erat
intentum" is abbreviated as Q.E.I.
--JGC