さかのぼったらしい
遡ったらしい
sakanobottarashii

Godan Verb (ru)
Evidential Auxiliary

Expresses appearance about a past event ("seems to have...") of さかのぼる

1. Seemed to have traced back; Apparently went back; Seemed to have reverted

Past/Perfective
Inferential Evidence
Usually Written in Kana