  Visible coronal structure, in particular the spatial evolution of coronal
streamers, provides indirect information about solar magnetic activity and the
underlying solar dynamo. Their apparent absence of structure observed during
the total eclipses of throughout the Maunder Minimum has been interpreted as
evidence of a significant change in the solar magnetic field from that during
modern cycles. Eclipse observations available from the more recent Dalton
Minimum may be able to provide further information, sunspot activity being
between the levels seen during recent cycles and in the Maunder Minimum. Here,
we show and examine two graphical records of the total solar eclipse on 1806
June 16, during the Dalton Minimum. These records show significant rays and
streamers around an inner ring. The ring is estimated to be ~ 0.44 R_S in width
and the streamers in excess of 11.88 R_S in length. In combination with records
of spicules or prominences, these eclipse records visually contrast the Dalton
Minimum with the Maunder Minimum in terms of their coronal structure and
support the existing discussions based on the sunspot observations. These
eclipse records are broadly consistent with the solar cycle phase in the
modelled open solar flux and the reconstructed slow solar wind at most
latitudes.
