What is the meaning of "できたれば"?

Question

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?

Answer 1

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?
• Meaning of る in 問われたる
• using 未然形 and 已然形 with conditional ば