E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Morning.
The first glass of whisky drunk by Scotch fishermen in salutation to the dawn. Thus one fisherman will say to another, Hae ye had your morning, Tam? or I haena had my morning, yet, Jock.
1
Having declined Mrs. Flockharts compliment of a morning, he made his adieus.Sir W. Scott: Waverley, chap. xliv: