This 25 HP Reeves cross compound Canadian special is an earlier type with a Broderick Brothers boiler and is shown pulling a combined harvester in the Judith Basin.
This 30 HP under mounted Avery is freighting in Montana. The location is not known to me. It has quite a load and sports extension rims.
This is the picture of Frank Strouf (left) standing by the 35 foot header of his combined harvester. It is being pulled by Strouf's 40_140 Canadian Special Reeves and the engineer is Frank Graves. This picture was on a front cover of the Country Gentleman Magazine around 1912 and has been in numerous publications since. That appears to be quite an unusual spark arrestor.
Dan Roen says he grew up around Buffalo-Pitts engines. His father had an 18 HP center crank engine in 1895. His uncle had a 30 HP that he spent time with when he was 'a little shaver.' This Buffalo-Pitts is hauling silver ore to the railhead at Armstead, Montana. I think this late model double cylinder is a 30 HP.
An earlier type of 30 HP under mounted Avery with a contractor's bunker is shown freighting a heating boiler down the muddy main street of Lewistown, montana. It is at Third Avenue in front of the power mercantile building.