How can you measure distance from one space into another space?
I understand walking out of the sheet of an ordnance map.

But the meaning of saying that Cambridge at 10 o'clock this morning in the appropriate instantaneous space for that instant is 52 miles from London at 11 o'clock this morning in the appropriate instantaneous space for that instant beats me entirely.

I think that, by the time a meaning has been produced for this statement, you will find that you have constructed what is in fact a timeless space.

What I cannot understand is how to produce an explanation of meaning without in effect making some such construction.

Also I may add that I do not know how the instantaneous spaces are thus correlated into one space by any method which is available on the current theories of space.
You will have noticed that by the aid of the assumption of alternative time-systems, we are arriving at an explanation of the character of space.