CP loco fuel

Here is note and question relating (perhaps) to the previous discussion of early use of coal.

We saw before that coal was apparently being tried first on the WP–as early as the fall of 1869.

Today I ran across a Gerry Best note (that's almost a stanza!) that "a car loaded with wood was placed behind each locomotive sent over the hill today to test and measure the amount consumed", from the Union of 17 September 1870.

This was two months after E.F. Perkins departed his post as general superintendent of motive power.

Question for Kyle (or anyone else with the info): when did A.J. Stevens assume that position?

Did Stevens come from the WP (or was that his brother?).

Wendell