[Invoice] 1858 May 29, Patent Dry GasMeter Manufactory, London [to] The Boston Gas Light Comp[an]y/Thomas Glover. 1p. The invoice, on headed notepaper depicting common and experimental gas-meters and the medals awarded to Thomas Glover's patent dry gas meters at the London, New York and Paris Exhibitions 1851, 1853 and 1855, amounts to £638-17-6 for the supply of "light meters"]