The Grey Cock or Saw You My Father is one of the famous English/Scots Child ballads (number 248). and is sometimes known as 'The Lover's Ghost'
It has been recorded many times, in particular by Eliza Carthy
A woman asks after her father, her mother, and her true-love John. Only John is there. He waits until all are abed and joins her. The woman tells the cock to crow when it is day; it crows an hour early, and she sends her love away before she needs to.