Approach the first stage from MacArthur Boulevard, which runs between Cuthbert Boulevard and Crystal Lake Avenue in Haddon Township. At the first stage you need to collect some nearby facts and figures to find the location of the cache. All the facts you need are on the sign - no internet needed.
First, how many acres of land did Joshua Sadler purchase in 1842? Multiply that number by eight and then subtract one. Insert the result in the latitude - 39° 54.0xx.
Second, how much did he pay for the land? Multiply that number by two and then subtract twenty. Insert the result in the longitude - 75° 03.xxx.
The cache is a camouflaged quart container.
History of the area from the Saddler's Woods Conservation Web Site
Saddler's Woods is a 25-acre urban forest located in Haddon Township, New Jersey. Saddler's Woods surrounds the headwater spring of the main branch of the Newton Creek, a tributary of the Delaware River in Camden County, and is unique for its combined features of an old growth forest, young woodlands, and wetlands all located within five miles of Philadelphia, PA. Every year, thousands of visitors enjoy Saddler's Woods for passive recreation and nature interpretation. The old growth portion is a time-capsule, showing visitors the type of forest that once existed when the Arowmen and Erinwonek tribes of the Leni Lenape nation lived here. In the early 1600s, European settlers began to arrive and the forests were cleared for farms, timber, and fuel. In the 1830s, Joshua Saddler escaped a Maryland plantation to seek refuge among the large Quaker abolitionist population. Joshua Saddler found work with a local Quaker farmer, Cy Evans, and gained his freedom. He purchased a small farm and raised his family next to the woods. In 1868 Joshua Saddler wrote into his will that none of his heirs "shall cut the timber thereon". For this preservation ethic, the woods, formerly known as the MacArthur Tract, were officially named in his honor in January 2004