1850 Federal Census Maryland, Worcester Co. the Cropper name has been misspelled in the INDEX. On the original microfilm it is Cropper. In the Index it is spelled Coopper. Be sure to search this spelling, otherwise you will not find some relatives. EX: page 256a (among others) line 38 house number 236.
I hope this helps some people. Also, the same 1850 Worcester images of pages available online are missing pages 339a to 344a (houses/families 1508 to 1597) involving approximately 89 families.