Added the following to both the Alto Trombone Timeline and the General Trombone Timeline–19th Century (2nd half):

1891—London, England: Explanatory notes from an exhibition of musical instruments includes the following about the trombone family in England: “The family of trombones consists in the present day of the alto in e-flat or f, the tenor in B-flat, and the bass in G or F. The F bass trombone is in constant use in Germany, but unfortunately is little employed in this country” (Day, Descriptive Catalogue 176).