Paterson Simons & Company.

British merchant house in nineteenth-century Singapore involved in the tin and gutta-percha trades. William Paterson and Henry Minchin Simons became partners with William Wemys Ker, of Ker, Rawson & Company, in 1853. When Ker retired in 1859, the company became Paterson & Simons.

Source

Ken 1965, Turnbull 1972.