Lakatoi and the Hiri Dalana is the latest book by Mary Mennis dealing with canoes and trading in Papua New Guinea. It is a companion book to Mariners of Madang which described the dadeng, the trading system, of the Bel people of Madang on the north coast. Lakatoi and the Hiri Dalana is about the canoes of the Port Moresby area of Papua New Guinea. Travelling on these canoes, the lakatoi, the Motu traders sailed on the Hiri route, the Dalana, to the Gulf of Papua. ... This book includes early photographs by explorers and missionaries, diagrams and descriptions of the pottery; the lakotoi; and the hiri exchange system.