According to thomas garret, what did the african americans in wilmington celebrate in april 1870?

In April, 1870, the black peo-
ple of Wilmington held a huge
celebration upon the passage of
the "$ eenth amendment to the
Constitution of the United States.
! at amendment provided that
the right of citizens to vote should
not be denied or abridged by the
United States or by any state on
account of race, color, or previous
condition of servitude.