The phrasing at the end is a bit weird. Kasia said that a boy brimming with mana was born 2 years ago. When Tulla asked where she heard about it from, she said "from said person". The only "person" mentioned at all here is the "boy brimming with mana". Kasia didn't say that someone told her this, just that this was a thing that was true. If what Kasia originally said originally meant that someone told her about the boy, and if Tulla asked her who she heard it from, then Kasia saying "from said person" would be redundant. The only "person" mentioned here is Ernon. Which means that Ernon has to be the boy. Which means Ernon is 2 years old. That... doesn't sound correct.