I went and did the math:
After going through all of the drawings of every Sp&s steam locomotive, disregarding all of my contradictions, and mistakes, the SP&S had at the least, 494 steam locomotives rostered. All, except for 4, are road engines.
There will be a "liquidation" of sorts to rectify all of the mistakes and to make that number more realistic, and to add a record of switching locomotives.
This is to prepare the world for a textual history of the SP&S