166, is a composition for harmonium or organ without pedal by Alfred Lefébure-Wély.
Lefébure-Wély was a gifted pianist and organist who studied at the Paris Conservatoire from age 14, including composition with Fromental Halévy who was known for his operas.
In 1988, organist David Britton played Boléro de concert as part of an organ recital recording, with music by mostly French composers.
[3] It appears on a 2006 recording of music by Lefébure-Wély played and arranged by organist Joachim Enders and trumpeter Manfred Bockschweiger at the Klais organ in St. Wolfgang near Dieburg.
[2] Martin Setchell included the piece in a recording of French organ music, volume VII of the series Great Australasian Organs, played at the Rieger organ of Christchurch Town Hall, which was silenced by the 2011 Christchurch earthquake.