What is the meaning of "できたれば"?


What does "できたれば" mean in the following sentence?

> 予とてわかっておる……目の上の瘤が取れ、心持ちに余裕が **できたれば** こそそんな思いも浮かぶのだ。かつては考えもせなんだことを

I assume it's related to できる but why is it not できれば?




This たれ is the realis-form (已然形) of たり, which is an auxiliary in
classical/archaic Japanese. This たり is like ている in modern Japanese, and 已然形 +
ば means "because". So できたれば translates to でき **ているから** in modern Japanese.
(Note that this れば is not "if"; see the last link below for details.)

Related:

  * [Please help me understand this たる?](https://japanese.stackexchange.com/q/40891/5010)
  * [Meaning of る in 問われたる](https://japanese.stackexchange.com/q/6985/5010)
  * [using 未然形 and 已然形 with conditional ば](https://japanese.stackexchange.com/q/80193/5010)




This たれ is the realis-form (已然形) of たり, which is an auxiliary in
classical/archaic Japanese. This たり is like ている in modern Japanese, and 已然形 +
ば means "because". So できたれば translates to でき **ているから** in modern Japanese.
(Note that this れば is not "if"; see the last link below for details.)

Related:

  * [Please help me understand this たる?](https://japanese.stackexchange.com/q/40891/5010)
  * [Meaning of る in 問われたる](https://japanese.stackexchange.com/q/6985/5010)
  * [using 未然形 and 已然形 with conditional ば](https://japanese.stackexchange.com/q/80193/5010)

