newport

That's probably meant to be Mrs. Charles DeLoosey Oelrichs, a prominent member of Newport society and a member of the Congressional Union for Woman Suffrage too. She married Charles DeLoosey Oelrichs (1882-1973), a stockbroker, in 1907, and they were divorced in 1921.

They had one child, daughter Margery (aka Marjorie, aka "Bubbles"); maybe that's her in the photo. If it is, she eventually married Eddy Duchin, the bandleader, in 1935, and became mother to Peter Duchin (b. 1937). Marjorie Oelrichs Duchin died two days after the birth of Peter.
en.wikipedia.org/wiki/Marjorie_Oelrichs
en.wikipedia.org/wiki/Eddy_Duchin
en.wikipedia.org/wiki/Peter_Duchin

The Mrs. Oelrichs in the photo above does not appear to be the same woman who, in another Bain/LOC photo, also is identified as Mrs. Oelrichs. Perhaps Bain made an error in one of the identifications. Moreover, the daughter in the other photo (who does not resemble the girl in this one) is identified as "Margaret," not "Marjorie." Here is the other photo:

Indeed, Wystan, this woman and daughter look more like the mother and daughter in the pictured labeled as Mrs. Amos Pinchot.
www.flickr.com/photos/library_of_congress/4037482176/
The daughter, in particular looks to be wearing the same hat.

www.newyorksocialdiary.com/node/136306
has pictures of Gertrude Minturn Pinchot that look like this woman, but is mainly about her daughter, who was the actress Rosamond Pinchot. Pictures of Rosamond as a girl on the web page could certainly be this girl.

The Oelrichs seem like a complicated family with a lot of same-named people; Margery/Marjorie Oelrichs, daughter of the Charles DeLoosey Oelrichs, was born after 1907, which would seem to make her a little younger than this child.

I like the alternate identification--they do look much more like the Gertrude and Rosamond Pinchot in the photo swanq links to. Not only the same hat on the girl--looks like it could be the same dress, socks, and shoes too!

In 1854, the U.S. Sloop of War CONSTELLATION was launched from Gosport. With similar dimensions to her famous predecessor, she carried 22 guns, had a crew compliment of 240 men, and displaced 1,400 tons with a beam of 42 feet and length of 176 feet.

The new ship's first assignment was interdicting the slave trade off the coast of Africa. She captured two slavers and released the imprisoned slaves. At the outbreak of the Civil War, CONSTELLATION made the first Union Navy capture, overpowering the slaver brig TRITON in coastal waters off Africa.

After the war, CONSTELLATION saw various duties such as carrying famine relief stores to Ireland and carrying precious American works of art to the Paris Exposition of 1895.

In 1894, CONSTELLATION became a training ship for the Naval Training Center in Newport, R.I. In addition to being used extensively as a training ship for Naval Academy midshipmen, she also helped train more than 60,000 recruits during World War I.

Decommissioned in 1933, CONSTELLATION was re-commissioned as a national symbol on August 24, 1940 by President Franklin Roosevelt. Shortly after the country's entry into World War II, she became the flagship for Admiral Ernest J. King and Admiral Royal Ingersoll.

The treasured warship was decommissioned in February 1955 and was taken "home" to her permanent berth in Baltimore Harbor. Now a National Historic Landmark, she is the last existing Civil War era naval vessel and the last sail-powered warship built by the U.S. Navy.
www.ussconstellation.org/constellation_history.html

en.wikipedia.org/wiki/USS_Constellation_%281854%29 Currently moored in Baltimore's Inner Harbor. "In 1994 Constellation was condemned as an unsafe vessel. She was towed to a drydock at Fort McHenry in 1996, and her $9 million restoration project was completed in July 1999. On 26 October 2004, Constellation made her first trip out of Baltimore's Inner Harbor since 1955. The trip to the U.S. Naval Academy in Annapolis lasted six days, and it marked her first trip to Annapolis in 111 years."

NYT of May 25, 1915 query.nytimes.com/gst/abstract.html?res=940DE2DB1338E633A... reported "NEWPORT, R.I., May 24. -- Through the assistance given by Captain Roger Welles, commanding officer of the Naval Training Station, a public welcome will be held tomorrow noon on the return to the station of the historic corvette Constellation from Norfolk. Mayor Robert S. Burlingame will preside, and Captain Welles will read a history of the ship. "

Previously called Olsonville.