The mansion stood on a large expanse of land, a farm owned by Mayor Brent, that also went to Eleanor.
Congressman Pearson also purchased additional properties and expanded the estate further.
The property then known as Brentwood was larger than the present neighborhood known as Brentwood.
Images of the mansion may be found in the book Capital Losses: A Cultural History of Washington's Destroyed Buildings by James W. Goode, and in several books in the collection of the Historical Society of Washington, D.C.  A descendant (Edward Sisson) of the family that owned the mansion throughout its existence has posted a collection of paintings, drawings, photos, and histories of the mansion on-line in an "album" titled "Worthington House and Brentwood Mansion" on a Mac Web Gallery site.
 The Frick Art Reference Library has drawings, paintings, and perhaps photographs (although none appear to be accessible on-line as of late 2007).
On the Web, a small drawing of the mansion, together with a brief description of its owners in 1873, Capt.
and Mrs. Carlile Pollock Patterson, may be found in "Washington Outside and Inside" by George Alfred Townsend, at page 620, searchable as a Google book.

The design of Brentwood Mansion has traditionally been ascribed to the Capitol's architect, Benjamin Latrobe.
The definitive 2006 book, The Domestic Architecture of Benjamin Henry Latrobe, by Michael W. Fazio and Patrick Alexander Snadon (who call the house the Pearson House), states that this is uncertain.
At the time of the house's design, Latrobe was suffering family troubles and his records for this period are poor.

During the administration of President Ulysses S. Grant (1869-1877), Brentwood Mansion was a center of Washington social life, with many parties hosted by Elizabeth (Eliza) Worthington Patterson (daughter of Joseph Pearson and his third wife Catherine Worthington Pearson) and her husband Carlile Pollock Patterson.
Patterson had known Grant since 1852; Patterson's brother-in-law David Dixon Porter, married to Patterson's sister George Ann, was the highest-ranking Admiral in the US Navy; and Patterson's brother Thomas H. Patterson was commander of the Washington Navy Yard (1873-1876) before becoming the Rear Admiral in command of the Asiatic Squadron (1877-1880).
Patterson Street, N.E., which is adjacent to the property, was probably named for the Patterson family.

C.P. Patterson, a Naval officer and ship captain turned scientist and administrator of a government department, had neither the interest nor the aptitude to manage the transformation of a large rural farming and forest property into an urbanized part of the city growing around it.
After C.P. Patterson's death in 1881, long-delayed financial problems came to a head, and on June 6, 1884, three years after Patterson's death, Congress enacted a private bill, House bill No.
4689, entitled "An act for the relief of Eliza W. Patterson," C.P. Patterson's widow, excusing accumulated District of Columbia property taxes on the Patterson land.
President Chester A. Arthur neither signed nor vetoed the bill, but held it ten days and allowed it to become law without his signature.
In a message dated June 21, 1884, the President explained "I do not question the constitutional right of Congress to pass a law relieving the family of an officer, in view of the services he had rendered his country, from the burdens of taxation, but I submit to Congress that this just gift of the nation to the family of such faithful officer should come from the National Treasury rather than from that of this District, and I therefore recommend that an appropriation be made to reimburse the District for the amount of taxes which would have been due to it had this act not become a law."

After five more years of drift in management of the property, in March 1889, Patterson's son-in-law, Lt.
Francis Winslow (II) USN (oldest brother of future Rear Admiral Cameron Winslow), after 19 years of Naval service during the slow-promotion post-war years, resigned from the Navy to devote himself to subdividing, renting, develo
The mansion stood on a large expanse of land, a farm owned by Mayor Brent, that also went to Eleanor. Congressman Pearson also purchased additional properties and expanded the estate further. The property then known as Brentwood was larger than the present neighborhood known as Brentwood. Images of the mansion may be found in the book Capital Losses: A Cultural History of Washington's Destroyed Buildings by James W. Goode, and in several books in the collection of the Historical Society of Washington, D.C.  A descendant (Edward Sisson) of the family that owned the mansion throughout its existence has posted a collection of paintings, drawings, photos, and histories of the mansion on-line in an "album" titled "Worthington House and Brentwood Mansion" on a Mac Web Gallery site.  The Frick Art Reference Library has drawings, paintings, and perhaps photographs (although none appear to be accessible on-line as of late 2007). On the Web, a small drawing of the mansion, together with a brief description of its owners in 1873, Capt. and Mrs. Carlile Pollock Patterson, may be found in "Washington Outside and Inside" by George Alfred Townsend, at page 620, searchable as a Google book.
The design of Brentwood Mansion has traditionally been ascribed to the Capitol's architect, Benjamin Latrobe. The definitive 2006 book, The Domestic Architecture of Benjamin Henry Latrobe, by Michael W. Fazio and Patrick Alexander Snadon (who call the house the Pearson House), states that this is uncertain. At the time of the house's design, Latrobe was suffering family troubles and his records for this period are poor.
During the administration of President Ulysses S. Grant (1869-1877), Brentwood Mansion was a center of Washington social life, with many parties hosted by Elizabeth (Eliza) Worthington Patterson (daughter of Joseph Pearson and his third wife Catherine Worthington Pearson) and her husband Carlile Pollock Patterson. Patterson had known Grant since 1852; Patterson's brother-in-law David Dixon Porter, married to Patterson's sister George Ann, was the highest-ranking Admiral in the US Navy; and Patterson's brother Thomas H. Patterson was commander of the Washington Navy Yard (1873-1876) before becoming the Rear Admiral in command of the Asiatic Squadron (1877-1880). Patterson Street, N.E., which is adjacent to the property, was probably named for the Patterson family.
C.P. Patterson, a Naval officer and ship captain turned scientist and administrator of a government department, had neither the interest nor the aptitude to manage the transformation of a large rural farming and forest property into an urbanized part of the city growing around it. After C.P. Patterson's death in 1881, long-delayed financial problems came to a head, and on June 6, 1884, three years after Patterson's death, Congress enacted a private bill, House bill No. 4689, entitled "An act for the relief of Eliza W. Patterson," C.P. Patterson's widow, excusing accumulated District of Columbia property taxes on the Patterson land. President Chester A. Arthur neither signed nor vetoed the bill, but held it ten days and allowed it to become law without his signature. In a message dated June 21, 1884, the President explained "I do not question the constitutional right of Congress to pass a law relieving the family of an officer, in view of the services he had rendered his country, from the burdens of taxation, but I submit to Congress that this just gift of the nation to the family of such faithful officer should come from the National Treasury rather than from that of this District, and I therefore recommend that an appropriation be made to reimburse the District for the amount of taxes which would have been due to it had this act not become a law."
After five more years of drift in management of the property, in March 1889, Patterson's son-in-law, Lt. Francis Winslow (II) USN (oldest brother of future Rear Admiral Cameron Winslow), after 19 years of Naval service during the slow-promotion post-war years, resigned from the Navy to devote himself to subdividing, renting, develo
Brentwood (Washington, D.C.)