At once; immediately.
And she went forth, and said unto her mother, What shall I ask? And she said, The head of John the Baptist. And she came in straightway with haste unto the king, and asked, saying, I will that thou give me BY AND BY in a charger the head of John the Baptist. ( Mark 6:24-25 )
Bibliography Information"Entry for 'By and by'". A King James Dictionary.