Sorry, Rick, where did you see the stock car notation for an "exchange" of 50 cars?
The first annual report list the narrow gauge roster as of June 30, 1900, as having 13 twelve ton capacity stock cars (these would be the D&LG and UPD&G 26 and 27 foot cars) and 50 stock cars of 50,000 lb capacity (these would be the new ACF 30 foot "phase 1" stock cars, just delivered).
Did I miss a notation somewhere? Which of the two document sets are you referring?
Jim Courtney
Poulsbo, WA