Aerial Effects for Con Layers

According to this phonology Basque has F but at one point maybe it didn't or is it that some cases of F became H. It's again an aerial effect because I know that Spanish has many, it's sort of irregular but there are many instances of Latin F becoming Spanish H and then being dropped. That's why you get so many spellings with the silent H at the beginning. Gascon which is basically an oxygen language which is spoken in the same area as the northern Basque country has that F initial F becoming H for all cases,. Unlike Spanish which kept it in some cases it lost it in all cases. So it's really an aerial effect.