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[[C W Bowles| Colonel C W Bowles]], an Army Civil engineer, was in charge of the construction of the [[Bengal Nagpur Railway]](BNR) works at [[Kharagpur]] <ref name =darvill>“Industrial Railways and Locomotives of India and South Asia” compliled by Simon Darvill. Published by ‘The Industrial Railway Society’ 2013. ISBN 978 1 901556 82-7. Available at http://irsshop.co.uk/India. Reference: Entry PB10 page ....</ref>. He used a monorail based on [[Ewing System Monorail|Ewing System]] during his time as engineer during laying of tracks for the BNR for transportation of construction materials <ref>[https://en.wikipedia.org/wiki/Patiala_State_Monorail_Trainways Wikipedia “ Patiala State Monorail Trainways” ]; Retrieved 1 Mar 2017</ref>. He had been appointed by the BNR Company in charge of constructing its workshops, houses, schools, churches, hospitals, armory, recreational facilities and a gaol <ref>[https://en.wikipedia.org/wiki/Colonel_C._W._Bowles Wikipedia “ Colonel C W Bowles]; Retrieved 1 Mar 2017</ref>.

This experiment allowed him to perfect the monorail based on the [[Ewing System Monorail|Ewing System]] which he subsequently used to construct the [[Patiala State Monorail Trainways]]