Question: What years was the mansion built on what later became Roslyn Air National Guard Station built?

Context paragraphs:
Roger E. Combs: Roger E. Combs is a retired Major General in the Air National Guard.  His last assignment was as the Director of Strategic Plans and Policy (J-5) for the National Guard Bureau.  In this position he was responsible to the chief, National Guard Bureau to develop, promulgate and implement policy, plans, concepts and strategy for the nearly half million citizen soldiers and airmen of the Army and Air National Guard.  His duties touched and concerned war-fighting, peacetime international activities and aspects of the federal and state homeland security and civil support missions of both the National Guard Bureau and the corporate National Guard.  The mission scope of the J-5 Directorate also includes representing the chief of the National Guard Bureau in Department of Defense, inter-agency, intergovernmental and non-governmental forums.  Previously, General Combs was assistant Adjutant General for Air and deputy commander of Joint Forces Headquarters, Missouri.  He also served as the Air National Guard assistant to commander, First Air Force, Tyndall Air Force Base, Florida.

103rd Air Control Squadron: 103rd Air Control Squadron is a National Guard squadron assigned to the Connecticut Air National Guard.  It provides theater command with air battle management, radar surveillance, air space control, and long haul communication capabilities to plan and execute combined air operations, air superiority and air strike ground attack operations, and provides state authorities with a dedicated force ready to react to local and national emergencies.  The unit is located on Orange Air National Guard Station in Orange, CT.

Roslyn Air National Guard Station: Roslyn Air National Guard Station (ADC ID: P-3) is a closed United States Air Force station.  It is located 1 mi south of East Hills, New York on Long Island.  It was originally part of Clarence MacKay's Harbor Hill estate.  It was closed in 2000.

Paul A. Weaver: Maj Gen Paul A. Weaver Jr. (born 19??  - ) was the director of the Air National Guard from 28 January 1998 to 3 December 2001.  His pilot career started in 1967 as an F-4E pilot in West Germany.  He also served, at Osan Air Base, South Korea, and the Republic of Korea Tiger Division, Camp Red Cloud, Korea.  He served as the air commander for the New York Air National Guard, and was responsible for the largest conversion in the history of the Air National Guard, at 105th Airlift Group, Stewart Air National Guard Base, New York.  Under his command, the 105th Airlift Group converted from the Air Force's smallest aircraft, the 0-2 Skymaster, to the largest aircraft, the Lockheed C-5 Galaxy.  He also oversaw the largest military construction project in the history of the Reserve Forces, the construction of Stewart Air National Guard Base.

Harbor Hill: Harbor Hill was a large Long Island mansion built from 1899-1902 in Roslyn, New York, commissioned by Clarence Hungerford Mackay.  It was designed by McKim, Mead, and White, with Stanford White supervising the project.  It was the largest home he ever designed.

Robert I. Gruber: Major General Robert I. Gruber is a retired United States Air Force officer who served as an assistant to the director, Air National Guard, for special projects, as the Air National Guard assistant to the judge advocate general and as principal advisor on Air National Guard legal services matters to the judge advocate general.  His responsibilities included training oversight and operational readiness of more than 260 Air National Guard attorneys and more than 160 Air National Guard paralegals, and as chair of the judge advocate general's Air National Guard council, coordinating policies and programs for Air National Guard judge advocates and paralegals with the judge advocate general and the director, Air National Guard.

170th Fighter Squadron: The 170th Fighter Squadron (170 FS) is an inactive unit of the Air National Guard.  It was last assigned to the 183d Fighter Wing located of the Illinois Air National Guard at Capital Airport Air National Guard Station, Springfield, Illinois.  The 170th last flew the Block 30 General Dynamics F-16 Fighting Falcon.  It was inactivated on 30 September 2008.

George G. Finch: Maj. Gen. George G. Finch became the Senior Leader of the US Air National Guard; (Chief of the Air Division National Guard Bureau) (1948-1950) In June 1953 it was reported that Gen. Mark W. Clark would retire and be replaced by Maj. Gen George G. Finch on the UN command delegation to the Korean armistice talks George G. Finch, born April 11, 1902 in Dade City, Florida, is considered one of the pioneers in United States aviation history.  He began his military career during World War 1, enlisting in the Aviation Section of the Army's Signal Corps in 1918.  He remained in the Reserve Corps after the war, and in 1926, became Commander, 27th Pursuit Squadron, 1st Pursuit Group.  In 1940, Georgia Governor Ed Rivers commissioned him to form the first flying unit of the Georgia Air National Guard.  The unit was mobilized into the U.S. Army in September, 1941, with Major Finch as commander.  After World War II, he was a leading critic of efforts to eliminate the air arm of the National Guard during peacetime.  General Finch gained the respect and admiration of Air National Guardsmen throughout the nation with his steadfast support and successful efforts to preserve the Air Guard.  He became the first Chief of the Air Force Division of the National Guard Bureau in 1948.  Under his leadership, the Air National Guard built to combat readiness and was among the first components called into service after the outbreak of the Korean War.  As a result of General Finch's vision and perseverance, 45,000 highly trained officers and airmen of 22 wings and 65 squadrons gave the Air Force the strength it needed in the early, critical phases of the Communist drive down the Korean peninsula.General Finch served as the senior Air Force member of the United Nations negotiating team at the peace talks at Panmunjom, Korea, and received the Legion of Merit for outstanding service in 1955; General Finch assumed command of Fourteenth Air Force, Robins AFB, Georgia, becoming the nation's first Air National Guardsman to head a numbered air force.  General Finch had a career of "firsts" including the US Army's first night landing with a single, five-million-candlepower floodlight in 1927.  He also established and endowed the General John P. McConnell Award at the United States Air Force Academy.  Considered by many as the father of the strong, independent Air National Guard existing today, General Finch retired in 1957.  No man has had greater impact on the Air Force Reserve and National Guard than has General George G. Finch.A graduate of the University of Georgia and a member of the Georgia Bar, General Finch was enshrined in the Georgia Aviation Hall of Fame May 18, 1996.

226th Combat Communications Group: The United States Air Force's 226th Combat Communications Group is a combat communications headquarters unit located at Abston Air National Guard Station in Montgomery, Alabama, USA.  The Group is one of two Air National Guard Combat Communications Groups nationwide, which together constitute over 60% of the U.S. Air Force's tactical communications capability.  The 226 CCG is one of three major organizations that make up the Alabama Air National Guard.

Capital Airport Air National Guard Station: Capital Airport Air National Guard Station is a 91 acre facility on land leased from the Springfield Airport Authority (SAA), located on the grounds of Abraham Lincoln Capital Airport.  It is home to the 183d Fighter Wing (183 FW), an Illinois Air National Guard unit operationally gained by the Air Combat Command (ACC) and State Headquarters, Illinois Air National Guard.  Historically a fighter unit, the 183 FW consists of 321 full-time and 800 part-time military personnel (total strength 1,321).

Supporting paragraphs: Roslyn Air National Guard Station Harbor Hill
Answer: 1899-1902