[a] Mileage 1852 for January to September (no record of mileage
recorded in Annual Reports previous to 1852).
[b] 15,000 to 20,000 miles per year was considered very high
mileage for a locomotive of the 1850's.
[c] No mileage reported for any engines due to fire.
[d] Not listed on roster.
[e] The Pennsylvania Railroad claims a total mileage of 255,675.
This may be accounted for by records of mileages for 1862, 1870,
and 1879.
In 1871 the _Pioneer_ was remodeled by A. S. Hull, master mechanic of
the railroad. The exact nature of the alterations cannot be determined,
as no drawings or photographs of the engine previous to this time are
known to exist. In fact, the drawing (fig. 8) prepared by Hull in 1876
to show the engine as remodeled in 1871 is the oldest known illustration
of the _Pioneer_. Paul Westhaeffer, a lifelong student of Cumberland
Valley R. R. history, states that according to an interview with one of
Hull's descendants the only alteration made to the _Pioneer_ during the
1871 "remodeling" was the addition of a handbrake. The road's annual
report of 1853 describes the _Pioneer_ as a six-wheel tank engine. The
report of 1854 mentions that the _Pioneer_ used link motion. These
statements are enough to give substance to the idea that the basic
arrangement has survived unaltered and that it has not been extensively
rebuilt, as was the _Jenny Lind_ in 1878.
By the 1870's, the _Pioneer_ was too light for the heavier cars then in
use and by 1880 it had reached the end of its usefulness for regular
service. After nearly thirty years on the road it had run 255,675 miles.
Two new passenger locomotives were purchased in 1880 to handle the
heavier trains. In 1881 the _Pioneer_ was dropped from the roster, but
was used until about 1890 for work trains. After this time it was stored
in a shed at Falling Spring, Pennsylvania, near the Chambersburg yards
of the C.V.R.R.