Census 1800 United States : Return of the whole number of persons within the several districts of the United States : according to "An act providing for the second census or enumeration of the inhabitants of the United States." passed February the twenty eight, one thousand eight hundred.
Census 1850 Maryland : History and statistics of the state of Maryland : according to the returns of the seventh census of the United States, 1850 / prepared under the direction of the secretary of the interior, by Jos. C.G. Kennedy.