Louis Spohr's String Quartet No.
18 ("Quatuor brillant") in B minor, Op.
61, is one of eight such works the composer wrote between 1806 and 1835, and was published about 1824.
[1] Like a concerto, the work is designed to display a soloist's skills, but in a more intimate setting than the concert hall.
This article about a composition for a chamber music group is a stub.