Swift of foot as a hare. The surname given to Harold I.,
youngest son of Canute (1035-1040).
To kiss the hare's foot.
To be too late for anything, to be a day after the fair. The hare
has gone by, and left its foot-print for you to salute. A similar
phrase is To kiss the post.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894