It was this regret in part that led to good relations when the next ships arrived in the islands sometime between 1804 and 1807. They were sealers from Sydney and word of their welcome soon gave the Moriori a reputation of being friendly. During this time at least one Moriori visited the New Zealand mainland and returned home with knowledge of the Māori. As more ships came, sealing gangs were also left behind on the islands for months at a time. Sealers and whalers soon made the islands a centre of their activities, competing for resources with the native population. Pigs and potatoes were introduced to the islands. However, the seals that had religious significance and provided food and clothing to the Moriori were all but wiped out. European men intermarried with Moriori. Māori arrivals created their own village at Wharekauri which became the Māori name for the Chatham Islands.