  We present multi-telescope, ground-based, multiwavelength optical and
near-infrared photometry of the variable L3.5 ultra-cool dwarf 2MASSW
J0036159+182110. We present 22 nights of photometry of 2MASSW J0036159+182110,
including 7 nights of simultaneous, multiwavelength photometry, spread over
~120 days allowing us to determine the rotation period of this ultra-cool dwarf
to be 3.080 +/- 0.001 hr. Our many nights of multiwavelength photometry allow
us to observe the evolution, or more specifically the lack thereof, of the
light curve over a great many rotation periods. The lack of discernible phase
shifts in our multiwavelength photometry, and that the amplitude of variability
generally decreases as one moves to longer wavelengths for 2MASSW
J0036159+182110, is generally consistent with starspots driving the variability
on this ultra-cool dwarf, with starspots that are ~100 degrees K hotter or
cooler than the ~1700 K photosphere. Also, reasonably thick clouds are required
to fit the spectra of 2MASSW J0036159+182110, suggesting there likely exists
some complex interplay between the starspots driving the variability of this
ultra-cool dwarf and the clouds that appear to envelope this ultra-cool dwarf.
