The speaking in tongues was a sign to Peter that they should be baptised immediately.
My question was were they saved prior to being baptised?
I would also add that the Lord required of him (Cornelius) Baptism:
Acts 10: What is it, Lord?....call hither one Simon, who is surnamed Peter: 6 He lodgeth with one Simon a tanner, whose house is by the sea side. He will tell thee what thou must do.
47 Then Peter answered: Can any man forbid water, that these should not be baptized, who have received the Holy Ghost, as well as we? 48 And he commanded them to be baptized in the name of the Lord Jesus Christ.