The E. L. McGlashan Collection of Documents Concerning Slavery in the United States consists of manuscript bills of sale, receipts, estate appraisals, deeds of gift, manumission statements, promissory notes, and other papers documenting slave ownership and the slave trade in the United States between 1770 and 1863. The bulk of the material documents slavery in North Carolina, South Carolina, Virginia, Georgia, Kentucky and Alabama. There are also legal documents recording slavery transactions in Maine, Tennessee, Pennsylvania, and Louisiana.

The materials were collected by an amateur Americanist named Everitt Lynn McGlashan, who purchased most of the materials on family trips in the South during the 1960s.

The collection finding aid includes a more detailed description of the papers and their provenance: E. L. McGlashan Collection Finding Aid