The Negro String Quartet was a combo that performed in the early 20th century, mainly in churches, community organizations and college venues in New York City.

[1] The quartet was founded by Weir who toured widely in the early 20th century in duet with cellist Leonard Jeter.

In 1914 Weir and Jeter expanded once again and formed the American String Quartet by dropping pianist Olyve and adding violinists Joseph Lymos and Hall Johnson.

[2] The high point of the group's existence came November 27, 1925, when the Negro String Quartet appeared in concert at New York's Carnegie Hall with renowned singer Roland Hayes.

The performance drew praise from New York Times music critic Olin Downes who described the program of classical works and traditional Negro spirituals as coming together "in the presence of a common ideal of beauty," to which the audience that had packed the hall "listened with unusual intentness and applauded with discriminating enthusiasm.