When John Jay began planning his Westchester farm in the 1790s, he was fortunate to find a source of clay on his property which he used to make the brick for constructing a house and various farm buildings. Archeological testing has identified the manufacturing site where bricks were formed, dried, stacked and burned in kilns. Later this field was used as meadow and pasture land. This field is currently used for special events and programs, and an apiary is located in the southeast corner.