This is a slow, moving piece of music for the flute composed a few hundred years ago, in the Baroque Era 1685 -1750).
Jean-Baptiste Loeillet of London (November 18, 1680 – July 19, 1730), composed music
for and performed on the recorder, flute, oboe, and harpsichord.
So did another Jean-Baptiste Loeillet, of the same era, this one from Gant.
I have been unable to establish which of them composed this beautiful piece, so I
mention them both.