Series II. Navy Agent and Hemp Merchant Papers contains correspondence, reports, and legal and financial papers reflecting Browne's tenure as Boston Navy Agent and Navy Pension Agent, and his interest in the growth and sale of hemp to the United States Navy. The correspondence includes purchase and transport orders for Navy goods and machinery, pension requests and news of the Springfield, Illinois, hemp farm. Also included are letters and memorials regarding Browne's conflicts with the government: questions concerning his Navy Agent accounts and the prices of hemp shipments delivered to the United States navy. The case materials also document a disagreement between Browne and the government.

This series includes Browne's 1841 navy Agent appointment (signed by President John Tyler), receipts for Navy stores and repairs, reports on the international hemp market, accounts for raising and manufacturing hemp, a contract for building a hemp factory, and 1850 navy Pension Agent accounts.