{"value"=>"<p>Documents were arranged, numbered and endorsed by the USSC’s Archive Department in 1865-1866. Over 30,000 items are listed in Archive Department registers for the Central Office 1861-1865; see the New York, N.Y. Archives record group (MssCol 22263), volumes 6-10, in series IV. Historical Bureau.</p> <p>Letters, telegrams, reports, shipping invoices and additional material are arranged chronologically by year and numbered consecutively within each year. This pattern differs from New York Office numbered documents, numbered consecutively across the entire series.</p> <p>Materials within each year are broadly grouped by genre. Items lacking dates or parts of dates are filed at the end of a month or year for that group, or at the end of the year. Letters and reports together are typically followed by invoices of goods sent (bills of lading), accounts of stock, bills, receipts for express shipments, and similar documentation for supply orders, issues and receipts, in varying order. These may be followed by a second group of letters and reports, often arranged separately due to their content, and miscellaneous items. Many invoices, stock accounts and receipts from 1862 forward were destroyed during later 19th-century USSC arrangements.</p> <p>Some letters are noted as having been referred to particular USSC departments, such as the Special Relief Department, Hospital Directory, or Army and Navy Claim Agency. In these cases, only a paper place marker with the same endorsement as the original letter remains, since the original document was referred elsewhere. Such letters are likely to be found in other USSC record groups.</p> <p>Many documents bear earlier Central Office (“C.O.”) numbering and endorsements, as well as pencilled markings from prior conservation treatments.</p>"}