Lyric discussion by StevieRudes 

Cover art for Dilly lyrics by Band of Horses

It really took a tall one to see it two to believe it three to just get in the way

If he is indeed saying 'tall" one and not toll, he is probably sitting down and having a 'tall one' which is an alcoholic beverage, and then 2 drinks to believe it, and finally 3 drinks to get in the way of a rational conclusion. Just a thought.