As the King emerged from The London Clinic, smiling and waving to well-wishers and the gathered media, he appeared fighting fit, despite having undergone prostate treatment three days earlier.
With his beloved wife the Queen by his side, as she had been frequently during his three-night hospital stay, he departed to continue recuperating in private.
Aides have declined to give further details of how long his recovery will take, but understands that he may not carry out public engagements