Complex sentence: It was built by John Turnbull Thomson (1821-1884), a government surveyor the lighthouse foundation stone was laid on 24 May 1850, in the presence of Governor William J. Butterworth and other dignitaries, and was completed in 1851.
Split into simpler sentences: It was built by John Turnbull Thomson (1821-1884), a government surveyor. The lighthouse foundation stone was laid on 24 May 1850, in the presence of Governor William J. Butterworth and other dignitaries, and was completed in 1851.