The Old Phoenix Multiverse
A series of horizontal parallel straight lines.
An arrow pointing from left to right at the foot of the page.
No other arrow on the page.
The straight lines are parallel, not successive, timelines.
The vertical is the inter-cosmic dimension.
Inter-universal travelers move up and down the page.
Maybe they move off it to enter the Old Phoenix?
To them, all timelines are present; none are past.
Each timeline is not derived from the one below it as is the case in the Time Patrol universe.