Marian and Agnes Wilder were the daughters of
James Lewellyn Wilder, the son of
Francis L. Wilder, the son of
Hadassah Thompson Wilder, the daughter of
Asaph Thompson the son of
Peter Thomson, the son of
Martha Soule Thomson, the daughter of
Martha Tinkham Soule, the daughter of
Ephraim Tinkham, Jr.
Ephraim Tinkham Jr. is considered an important furniture maker in early New England colonial history. It is believed that other chair makers were taught by him and copied his work. This group of artisans are known as the "Tinkham School". Several chairs that are either known or believed to havevbeen created by Tinkham still exist. When, on occasion they come to auction, they command very high prices.
Here are links to information about Ephraim Tinkham chairs.
1680 American chair attributed to Ephraim Tinkham Jr., showcased by Saatchi Galleries, London