Dr Desmond P. Ballantyne M.B. B.S. J.C.U. was the first of five names on the brass plate beside the door of Katherine's Giles Street Medical Centre, but Dr Ballantyne was the only one you were likely to find on the premises on a Saturday or Sunday afternoon.
That doesn't suggest any lack of commitment from the other four medical practitioners who worked out of the building.
Doctors are busy people, and some of them have social lives.
But this particular doctor had something to do seven days a week.
Some of those things were best done undisturbed, so Ballantyne liked to drop into the surgery after lunch on the weekends.
Staying at home, as he knew from experience, was counterproductive.
Phones rang, kids yelled, friends dropped by, and while some things might get done, there was no guarantee.
So Ballantyne was cagey.
After breakfast on Saturday and Sunday morning, his wife dropped him off at the Centre.
Each Saturday he took the car that sat in the car park when it wasn't in use as the Centre's Courtesy Vehicle for a drive.
On an average week, it might leave the premises once or twice, but it was there if needed, and when it was needed, it needed a battery, didn't it?