![A photograph of the Pioneer, a steam locomotive, which was built in Boston and put into service in San Francisco, ca. 1868. | DPLA A photograph of the Pioneer, a steam locomotive, which was built in Boston and put into service in San Francisco, ca. 1868. | DPLA](https://d2jf00asb0fe6y.cloudfront.net/full-steam-ahead-steam-engine-transportation-nineteenth-century_11_fddeb28389f4c8a41e32badd2adf38c5.jpg)
A photograph of the Pioneer, a steam locomotive, which was built in Boston and put into service in San Francisco, ca. 1868. | DPLA
![Railpictures.ca - Michael Berry Photo: A pioneer steam engine. Built by Baldwin Locomotive Works for Northern Pacific in 1872, this 4-4-0 steam engine was the first one to ever operate in the Railpictures.ca - Michael Berry Photo: A pioneer steam engine. Built by Baldwin Locomotive Works for Northern Pacific in 1872, this 4-4-0 steam engine was the first one to ever operate in the](http://www.railpictures.ca/wp-content/uploads/2016/09/DSC_0922.jpg)
Railpictures.ca - Michael Berry Photo: A pioneer steam engine. Built by Baldwin Locomotive Works for Northern Pacific in 1872, this 4-4-0 steam engine was the first one to ever operate in the
![Cumberland Valley RR 2-2-2 Pioneer | Steam trains photography, Cumberland valley, Steam engine trains Cumberland Valley RR 2-2-2 Pioneer | Steam trains photography, Cumberland valley, Steam engine trains](https://i.pinimg.com/originals/f8/bc/80/f8bc805f7699b47915348048461df249.jpg)
Cumberland Valley RR 2-2-2 Pioneer | Steam trains photography, Cumberland valley, Steam engine trains
![Pioneer Steam Locomotive at Chicago Shops - 1948 Greeting Card by Chicago and North Western Historical Society Pioneer Steam Locomotive at Chicago Shops - 1948 Greeting Card by Chicago and North Western Historical Society](https://render.fineartamerica.com/images/rendered/default/greeting-card/images/artworkimages/medium/1/pioneer-steam-locomotive-at-chicago-shops-1948-chicago-and-north-western-historical-society.jpg?&targetx=0&targety=-33&imagewidth=700&imageheight=567&modelwidth=700&modelheight=500&backgroundcolor=E7E7E7&orientation=0)