found: Humphries & Smith. Music publ. in the British Isles (2nd ed.):(Birchall, Robert, d. 1819)
found: Krummel & Sadie. Music printing and publ., 1990:(Birchall, Robert, b. ca. 1760, d. 19 Dec. 1819)
found: Haydn, Joseph. A fifth sett of sonatas for the piano forte or harpsichord, 1789:title page (Printed & sold by Robert Birchall)
found: Rossini, Gioacchino. Ah se giusto o ciel tu sei, quartetto, in the opera of Il Tancredi, 1817?:caption (Printed & sold by Rt. Birchall, No. 133, New Bond Street)
found: Rossini, Gioacchino. Amor! Possente nome! duetto, in the opera of Armida, 1819?:caption (Printed & sold by Messrs. Birchall & Co., 133, New Bond Street)
found: British book trade index online, viewed October 3, 2018(Birchall, Robert; born about 1760, died 1819; London music seller, publisher, and printer, librarian/owner of music circulating library; either partner or apprentice to William & Mrs. Elizabeth Randall; in business with T. Beardmore in 1783 as Beardmore & Birchall, or Birchall & Beardmore; 1783-1789 in partnership with Hugh Andrews as Birchall & Andrews; also issued publications under name Birchall & Co.; continued alone in firm until his death in 1819, succeeded then by Birchall, Lonsdale & Mills) - http://bbti.bodleian.ox.ac.uk/details/?traderid=6533
found: Grove Music online, viewed October 18, 2018(Birchall, Robert; born circa 1750 [sic], London, died December 19, 1819, London; English music seller, instrument dealer and publisher)
found: England & Wales, Prerogative Court of Canterbury Wills, 1384-1858, via Ancestry, viewed October 5, 2018(Robert Birchall; will codicil dated December 17, 1819, proved February 1, 1820; Residence: St. George Hanover Square, Middlesex, England)