The Prisoner told Mrs. Butterworth that he had two calls to make, one in town, the other in the country. Having allowed the Prisoner to borrow her Lotus seven he drives through the streets of London and parks the car in the same underground garage which he does in the opening sequence to the episode. Further more he eventually arrives in that exact same office where he handed in his letter of resignation to that very same bald-headed, bespectacled man still sat behind that desk. That's all very well as it goes, but who exactly had the Prisoner come to see? Surely not that same man sat behind the desk, because he has always struck me as nothing more than a receptionist, a first point of contact. In 'Do not Forsake Me Oh My Darling' having been returned to London, his mind wrongly housed in the body of the Colonel, the Prisoner goes to this office again, only by this time there has been a change in personnel sat behind that desk, it's now Danvers, Jonathan Perigrine Danvers. His transfer to this current position care of the girls in the typing pool! On this occasion the Prisoner demands to see Sir Charles Portland. Is that whom the Prisoner went to see during 'Many Happy Returns?' It was certainly someone, as his next call he pays is in the country, to see the Colonel at his country residence.
Another thought strikes me, in the opening sequence to 'the Prisoner' series, might it be that the Prisoner made those same two calls, but in reverse? After all the Prisoner is seen driving his Lotus seven in the countryside, and then in London to the office where he hands in his letter of resignation. Perhaps the Prisoner went to discuss the matter of the Prisoner's resignation first with the Colonel first at his country residence. But it would appear that the Colonel was unable to make the Prisoner change his mind. in that case, realising what the Prisoner was about to do, put the two Undertakers on the tail of the Prisoner, who eventually abducted him from his home. Well someone had to have told the two Undertakers to follow the Prisoner, I'm sure they were not just following him on the off-chance!
Be seeing you