Collection-level Scope and Content Note The Nidiffer Collection consists of 741 documents, about 600 of which are deeds, all concerning transactions in Washington City and County and Georgetown, all in the District of Columbia between 1817 and 1886. The documents are arranged chronologically one to a folder in 8 boxes.* * * * * * *The Nidiffer Collection contains an interesting documentary account of personal and family business transactions in the District of Columbia in the nineteenth century. About 600...