Coal was first reported in Brunei Darussalam near Muara as early as 1837. in Serai Pimping. The Muara coalmine was first mined commercially in 1883, when William Cowie was given the concession rights to mine the coal in exchange for $1,200 per year. However, Cowie later sold his rights to Rajah Charles Brooke and the Rajah renamed the mine Brooketon (Brooke Town).
Rajah Charles Brooke
Rajah