"Philadelphia (Pa.)" . . . . . . . . . . . . . "Journals (notebooks)" . . . . . . . . . . . . . . . "Logbooks" . . . . . "Letterbooks" . . "Notebooks" . . . . . . . . . . "Lectures" . . . "Bills" . . . . . . "Sketches" . . . . . . . . . . . . "Receipts" . . . . "Arctic regions" . . "Northwest Passage." . . "Africa" . . "Grinnell Expedition," . . "North Carolina" . . "Turkey" . . "Mexico" . . "Egypt" . . . .