References - B P & B Flasks

Artistry and Innovation in Pittsburgh Glass, 1808-1882: from Bakewell & Ensell to Bakewell Pears & Co
Arlene Palmer.
Frick Art and Historical Center, 2004.
Flasks marked "B P & B" are discussed on page 116. The company was called Bakewell, Pears and Bakewell until 1827 when John Palmer Bakewell joined the firm, at which point it became Bakewell, Pears and Bakewells.