Set of four small black and white prints of the interior of the Carlton MMTB substation, Bouverie St, Carlton during the construction phase. Printed on Kodak paper. Has English Electric equipment. .1 - Boxes of equipment and some assembled items .2 - View of substation with rotary converter and a switch board .3 - ditto with a transformer behind .4 - ditto and more boxes. Items .1 to .3 feature a man in a white shirt. Item .3 has a hand written note and arrow "ME".On rear in ink "Carlton" on all photos, with "Control Station" in addition on item .1trams, tramways, mmtb, substation, carlton, rotary converters, switchboards, english electric