  We present five decades of chromospheric activity measurements in 59 Sun-like
stars as time series. These include and extend the 35 yr of stellar
chromospheric activity observations by the Mount Wilson Survey (1966--2001),
and continued observations at Keck by the California Planet Search (1996--).
The Mount Wilson Survey was studied closely in 1995, and revealed periodic
activity cycles similar to the Sun's 11 yr cycle. The California Planet Search
provides more than five decades of measurements, significantly improving our
understanding of these stars' activity behavior. We have curated the activity
measurements in order to create contiguous time series, and have classified the
stellar sample according to a predetermined system. We have analyzed 29 stars
with periodic cycles using the Lomb-Scargle periodogram, and present best-fit
sinusoids to their activity time series. We report the best-fit periods for
each cycling star, along with stellar parameters (T$_{eff}$, log(g), v$sin(i)$,
etc.) for the entire sample. As a first application of these data, we offer a
possible Maunder minimum candidate, HD 166620.
