Here is what Gay Marglin emailed me so far, she also sent another photo to me showing a rather large vent hole, that looks big enough for a chimney. I can send it to anyone who is interested privately. Judy Wolf Thanks so much for your interest. We have had several well know archeologists come to the site, Lucy Johnson and Susan Dublin among others and so far the only real censuses of opinion seems to be that the structure was most likely built between 1820 and 1840. Every one has agreed that it is pre-civil war, not part of the Aqueduct, not part of the Underground Railroad and probably some type of storage.. The first time however which a structure appears on any map which might be our place is much later in the 1900’s, when an ice house appears. Over the years the property has been owned by many prominent people from Potter to Patterson and it was a “gentleman’s farm” and later more of a more working farm. We do have a fair amount of history but nothing to definitely identify the structure at this time. This was sent as an attachment: The following are excerpts from the church’s (which used to own this property and still owns the adjoining property) web site Eagle Park Very little is known about the land on which St. Augustine Church now stands. Indians probably lived there and hunted deer and bear in the surrounding wilderness. The Hudson and Croton Rivers provide fish and transportation. General George Washington and his troops are believed to have camped there; Washington's headquarters were located on the former site of Julien's Restaurant, now vacant land between the present Route 9 and Old Albany Post Road. A series of subterranean passages were constructed. Local historians think some of these were built as potential escape routes for Washington's troops. One of the more interesting features of the farm was a series of stone and brick walls, causeways and underground passageways. Granite from the farm's own quarry was used in their construction. Underground arched vaults, similar to the wine cellars, were used as silage pits for storing fodder for the herd of cows. The cows are led to pasture along these stone passageways and under bridges. Other parts of the subterranean passages were apparently used as root cellars for keeping vegetables grown at Eagle Park. At one time these passageways were also thought to have been part of the escape route used by slaves during the Civil War. Local historians doubt, however, that Eagle Park was part of the "underground railroad," since none of the passages had openings close to or on the river. for the complete text go to: _http://www.eaglepark.org/History/History_P4.htm_ (http://www.eaglepark.org/History/History_P4.htm) The following is from Douglas Mackey New York State Office of Parks, Recreation and Historic Preservation Once again I would like to thank you for sending along the photos of the structure that has recently come to light in the Mystic Point area (_http://ysqrd.smugmug.com/_ (http://ysqrd.smugmug.com/) ). After our discussions, I tried to find a historic map that may identify the structure. I have examined both the Beers 1867 Atlas of Ossining (#1 Below - _http://www.westchesterarchives.com/CW/images/WCHS/Atlas_1867/NY_and_Vicinity_p17_resize.jpg_ (http://www.westchesterarchives.com/CW/images/WCHS/Atlas_1867/NY_and_Vicinity_p17_resize.jpg) ) and the 1891 Beers/Watson Atlas of the Hudson River Valley from New York City to Troy, including a section of about 8 miles in width ( #2 below - _http://www.davidrumsey.com/maps1120851-28447.html_ (http://www.davidrumsey.com/maps1120851-28447.html) ). From our conversations my best guess is that the are is near the structure identified as a "School" on both maps. The 1900 Hyde Atlas and the 1908 Hyde/Belcher Atlas also show a school in this area (#3-_http://www.davidrumsey.com/rumsey/Size4/D0114/4204007.jpg_ (http://www.davidrumsey.com/rumsey/Size4/D0114/4204007.jpg) ; #4-_http://www.davidrumsey.com/rumsey/Size4/D0114/4205014.jpg_ (http://www.davidrumsey.com/rumsey/Size4/D0114/4205014.jpg) ). It is possible that the structure dates after 1908 in which case it would not show on these maps. The 1914 Bromely Atlas shows a complex of buildings in what I suspect is the area, including a school, library, ice house and "Grace Hall" (#5 - _http://www.davidrumsey.com/rumsey/Size4/D0114/4255095.jpg_ (http://www.davidrumsey.com/rumsey/Size4/D0114/4255095.jpg) ). The 1943 USGS topo map for this area shows a large structure in approximately the same area, but does not identify it (#6 - _http://docs.unh.edu/NY/ossn43nw.jpg_ (http://docs.unh.edu/NY/ossn43nw.jpg) ). A "Grace Hall" is identified on this map as well, but on the opposite side of the main road. If I am correct about the location, it appears that the structure found could be part of this "school" complex, however the photos do not depict anything that looks like a school to me. The again, I could be wrong about the location, but the maps do not seem to indicate any other substantial structures in this area through 1943 aside from residences. ************************************** See what's free at http://www.aol.com.