Economy: In this first and longest chapter, Thoreau outlines his project: a two-year, two-month, and two-day stay at a cozy, "tightly shingled and plastered", English-style 10' × 15' cottage in the woods near Walden Pond. He does this, he says, to illustrate the spiritual benefits of a simplified lifestyle. He easily supplies the four necessities of life (food, shelter, clothing, and fuel) with the help of family and friends, particularly his mother, his best friend, and Mr. and Mrs. Ralph Waldo Emerson. The latter provided Thoreau with a work exchange: he could build a small house and plant a garden if he cleared some land on the woodlot and did other chores while there. Thoreau meticulously records his expenditures and earnings, demonstrating his understanding of "economy", as he builds his house and buys and grows food.