I am up at half past four, so my evening ends before yours starts

I am on a site at six in the morning and I have been awake since half past four. By nine in the evening I am finished, and I mean that in the medical sense rather than as a preference. This has ended two things, both times slowly, both times with somebody perfectly reasonable who simply lived on a different clock.

Forty seven, out west, fifteen years in. What works for me is a late afternoon or an early evening, which in this city rules out most of what is organised and quite a lot of the people. What also works, and what I have twice found excellent, is a Saturday morning, which nobody ever suggests and which I would recommend to anybody.

I want to be clear that I am not asking anyone to restructure their life. I am asking to find out early whether our hours overlap at all, because they either do or they do not and no amount of enthusiasm changes it.

What I want is one person, regular, for a long time. I am extremely reliable and I do not cancel, and I am told I am dull about routine, which is fair.

Not looking for anything that starts at nine at night. Not looking for somebody who wants long conversations after ten. And not looking to be persuaded that I would manage it just this once, since I have tried and I was no company at all.