Since we're talking dates... in TC, as Eb is escorting Harry out after the action is done, they're talking about who's getting the open position on the Senior Council. Eb makes a comment regarding Langtry, saying,
"He's never been easy to read. And I've known him since I was sixteen years old.
TC, Ch. 49.
Eb could not have been born much if any later than 1738. This comes from
a. His admission to Harry in TC that he first met Langtry when he was sixteen, (Ch. 49), combined with
b. JB's comments that the two of them were on opposite sides of the French and Indian War (1754-1763), and
c. JB's indication that Eb is roughly 250 years old.
If Eb were only sixteen at the beginning of that war then he was born no later than (1754 - 16)= 1738. The older he was at the start of the war, the earlier his D.O.B.
The 1738 year would put him at 276 as of SG (2014) and thus 252 as of SF (2000), which seems pretty close to the bull's-eye to me.
Would an addendum in the Timeline between
1731 (269 BSF): Aleron LaFortier is born.
1754 to 1763: The French and Indian War. According to Jim, this was an eventful time in Ebenezer’s life!
posting 1738 the latest reasonable date of Eb's birth be reasonable?