到1867年,英政府殖民地部決定把海峽殖民地從英屬印度分立為獨立的皇家殖民地,並且直接向殖民地部負責,[7]由軍人出身的末任新加坡參政司羅納德·麥波申上校(Colonel Ronald MacPherson)遂過渡成為首任海峽殖民地輔政司。[8]至此,一共有八名人士曾實任新加坡駐紮官兼指揮官或新加坡參政司一職,前後合共經歷48年。[1]
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