Pharr Lesson XI - Aorists

[thesaurus]

I have a very basic question. I am working on the practice sentences in Lesson XI of Pharr and I can't understand some of the forms given.
[sorry I'm missing the diacritics]

6. οτε κακωσ Ï€Ï￾οσεειπεν ΑτÏ￾ειδησ ΧÏ￾υσην, τοτε εχολωσεν εκηβολον.

I'm reading it with the aorist, as "When the son of Atreus spoke wickedly to Chryses, he then angered the free-shooter." But what is going on with "Ï€Ï￾οσεειπεν" and "εχολωσεν"?

If the verb is third person aorist singular active, shouldn't it be "Ï€Ï￾οσεειπε" and "εχολωσε" without the "v"? Is it because the next word starts with a vowel?

Thanks for any help! I just bought myself Pharr for my debut in Greek and so far things are slow but very interesting.

[perispomenon]

Is it because the next word starts with a vowel?

It is a movable ν, see Pharr paragraph 561.

[thesaurus]

Is it because the next word starts with a vowel?

It is a movable ν, see Pharr paragraph 561.

Doh! I guess it's a late night for me. Thank you very much.

(Only a few more lessons until I get my first taste of Homer!)