From 1839 to 1841 Rankine worked on numerous projects that John Benjamin MacNeill was involved with, including river improvements, waterworks, railways and both harbours.
Mula 1839-1841 Rankine nagtrabaho sa maraming mga proyekto na John Benjamin MacNeill ay kasangkot sa, kabilang ang pagpapabuti ng ilog, patubigan, railways at parehong harbours.