  French astronomer Honor\'e Flaugergues compiled astronomical observations in
a series of hand-written notebooks for 1782$\unicode{x2013}$1830, which are
preserved at Paris Observatory. We reviewed these manuscripts and encoded the
records that contain sunspot measurements into a numerical table for further
analysis. All measurements are timings and we found three types of measurements
allowing the reconstruction of heliographic coordinates. In the first case, the
Sun and sunspots cross vertical and horizontal wires, in the second case, one
vertical and two mirror-symmetric oblique wires, and in the third case, a
rhombus-shaped set of wires. Additionally, timings of two solar eclipses also
provided a few sunspot coordinates. As a result, we present the time--latitude
(butterfly) diagram of the reconstructed sunspot coordinates, which covers the
period of the Dalton Minimum and confirms consistency with those of Derfflinger
and Prantner. We identify four solar cycles in this diagram and discuss the
observed peculiarities as well as the data reliability.
