He was later a merchant in Sydney , operating the firm of William Walker & Co .
Walker was originally a pastoralist , operating a series of stations in the Bega region , based out of the Kamarooka Estate .
Walker was later a pastoralist in Sydney , operating the firm of William Walker & Co .
Walker was originally a pastoralist , operating a series of stations in the Bega region , based out of the Kamarooka Estate .