From 1834 to 1835 Reverend Ephraim Spaulding had constructed a house of coral and volcanic stone at Lahaina. Thick walls were framed by hand-hewn timbers. In 1838 Spaulding had returned to the United States, so the Baldwin family moved in, and would own the house for almost 130 years. In 1840, a bedroom and study were added, and in 1849 an entire second story was completed.[10] The house was deeded from the Baldwin family to the Lahaina Restoration Foundation in 1967 for use as the Baldwin House Museum (also called the Baldwin Home Museum).[11] The House is located at 696 Front Street, 20°52′23″N 156°40′40″WCoordinates: 20°52′23″N 156°40′40″W. Baldwin's collection of scientific books grew to be over 200 volumes. Visiting scientists, such as those on the United States Exploring Expedition, stayed with his family.[12]