The Cummer Lumber Company of Jacksonville, Florida, and its successor, Cummer Sons Cypress Company, owned several steam locomotives which were primarily used to transfer logs from the woods to the mills and to switch cars of logs and lumber on the mill properties.
The smaller "Porter" locomotives were used primarily in the logging woods while the "Baldwin" locomotives like the "104" were used on the company's main-line railroads, and under trackage rights on the Florida railroads of the Seaboard Air Line and Atlantic Coastline.
All these locomotives were standard gauge and at first burned wood for fuel. They were later converted to burn coal.
The "104" was capable of pulling a heavy train load of 35 cars of logs.
At first this locomotive was used on the tracks of the company owned and built railroad- The Jacksonville and Southwestern- which ran from Jacksonville through Gainesville to Double Sink some 125 miles southwest of Jacksonville, the terminus of the extensive pine loggings. The logs were taken to the mill in Jacksonville. Later the "104" was used in Levy County to carry logs to the cypress mill at Sumner.
In 1928, with the building of a large modern cypress mill and box factory at Lacoochee, the "104" was used to transport the cypress logs from operations at Homosassa and Rutland. The locomotive pulled its full load of logs each day from these locations to Lacoochee under trackage arrangements with the Seaboard Air Line Railroad, using its own crew of engineer and brakemen.
With the closing of these logging camps the "104" was used on the mainline of the company's railroad at Lacoochee bringing in pine, cypress, and hard wood logs from the large holdings of timber lands there.
Later when this timber was cut-out and logs were shipped from many areas of Florida to the mill, the "104" was used as a switching enging, taking logs from the sidings to the mill and taking loaded cars of lumber and crate material back to the sidings for pick up by both major railroads of the state.
The "104" remained in service until the Lacoochee Mill closed in the 1960s. This locomotive and others owned by the Cummer Company were given to the towns and communities in Florida, near where they were used.