This approach to colonization of indigenous lands resulted in an acceleration of exploration and land claiming, particularly by France, England, and Holland. Land claims were made through symbolic "rituals of discovery" that were performed to illustrate the colonizing nation's legal claim to the land. Markers of possession such as crosses, flags, and plates claiming possession and other symbols became important in this contest to claim indigenous lands. In 1642, Dutch explorers were ordered to set up posts and a plate that asserted their intention to establish a colony on the land. In the 1740s, French explorers buried lead plates at various locations to reestablish their 17th century land claims to Ohio country. The French plates were later discovered by Indigenous peoples of the Ohio River. Upon contact with English explorers, the English noted that the lead plates were monuments "of the renewal of possession" of the land. In 1774, Captain James Cook attempted to invalidate Spanish land claims to Tahiti by removing their marks of possession and then proceeding to set up English marks of possession. When the Spanish learned of this action, they quickly sent an explorer to reestablish their claim to the land.