Najeeb M. Saleeby, The History of Sulu
“ The island is very rich in timber; all its hills and mountains are forest-clad to their summits. Excellent boats are constructed on the south and west coasts of the island which rival the Tawi-tawi boats in every particular. A few Americans have started hemp and coconut plantations on the north coast, but native cultivation is not extensive and compares very poorly with that of the Islands of Sulu, Tapul, and Siasi. Most of the cultivation on the island is carried on by Yakans, the Samals living chiefly on the products of the sea. The staple products of the soil are rice, tapioca, and corn. ”
