Sally O’Neill: Becke, George Lewis (Louis) (1855–1913). In: Australian Dictionary of Biography. National Centre of Biography, Australian National University, adb.anu.edu.au 1980.
Manuscripts/MS JM/F17 refers to 'Power of attorney of John Monger. A copy of a power of attorney granted by John Henry Monger of York, Western Australia, merchant, to Jardine, Matheson & Co. of Shanghai to collect debts from Glover, Dow & Co., merchants of Shanghai in liquidation, dated York, 11 June 1870'. Jardine Matheson Archive: Manuscripts/MS JM/F17 1870.
Manuscripts/MS JM/B6 refers to correspondence with 'C.A. Williams (Agent, American Guano Co., Honolulu)'. Jardine Matheson Archive: Manuscripts/MS JM/B6 1821–1898.