American Indians who resided in those parts, in a book entitled Travels into North America. Significance and legacy Historian H. Arnold Barton has suggested that the greatest significance of New Sweden was the strong and lasting interest in America that the colony generated in Sweden, although major Swedish immigration did not occur until the late 19th century. From 1870 to 1910, more than one million Swedes arrived in America, settling particularly in Minnesota and other states of the Upper Midwest. Traces of New Sweden persist in the lower Delaware valley, including Holy Trinity Church in Wilmington, Delaware, Gloria Dei Church and St. James Kingsessing Church in Philadelphia, Trinity Episcopal Church in Swedesboro, New Jersey, and Christ Church in Swedesburg, Pennsylvania. All of those churches are commonly known as "Old Swedes' Church". Christiana, Delaware, is one of the few settlements in the area retaining a Swedish name, and Upland survives as Upland, Pennsylvania. Swedesford Road is still found in Chester and Montgomery Counties, Pennsylvania, although Swedesford has long since become Norristown. Swedeland, Pennsylvania, is part of Upper Merion Township in Montgomery County. The American Swedish Historical Museum in South Philadelphia houses many exhibits, documents, and artifacts from the New Sweden colony. Perhaps the greatest contribution of New Sweden to the development of the New World is the log house building technique. The colonists of New Sweden brought with them the log cabin, which became such an icon of the American frontier that it is commonly thought of as an American structure. The C. A. Nothnagle Log House on Swedesboro-Paulsboro Road in Gibbstown, New Jersey, is one of the oldest surviving log houses in the United States. Finnish influence The settlers came from all over the Swedish realm. The percentage of Finns in New Sweden grew especially towards the end of the period of colonization. Finns composed 22 percent of the population during Swedish rule, and rose to about 50 percent after the colony came under Dutch rule. A contingent of 140 Finns arrived in 1664. The ship Mercurius sailed to the colony in 1665, and 92 of the 106 passengers were listed as Finns. Memory of the early Finnish settlement lived on in place names near the Delaware River such as Finland (Marcus Hook), Torne, Lapland, Finns Point, Mullica Hill, and Mullica River. A portion of these Finns were known as Forest Finns, people of Finnish descent who had been living