Hello and thank you for using JA.
The common firing order or 4 cylinder is 1,3,4,2
But since this is 1919 car, I'm not preaty sure what is the precise order, but what I can recomend you to do is, if you have piston compression tools, then that will guide you to which one will fire next afte the one, all you need to find out is either 3 or 4 is the next one that will fire, because the 2 is not possible to fire next to one.