Sub-subseries 1. Incoming contains incoming correspondence. The incoming correspondence topics cover the lumber and timber business, stock holder meeting notices and stock dividend payments, the payment of mortgages and leases, some advertisements, landscaping orders, and the occasional letter asking David to give to a charity. Most of the correspondence is business related, however, there are a handful of letters from family members discussing personal matters. Of particular interest in this sub-subseries is a letter from Booker T. Washington, the principal of the Tuskegee Normal and Industrial Institute, asking David for a second donation to help with students’ tuition (dated November 12, 1896). There is a photocopy of a January 1, 1895 letter to David Pingree from North Packing and Provision Co.; the original letter is not in the collection, its location is unknown.