The enlarged prints in this box are all on an industrial theme, the majority of them likely to be commissions which Trotter received. Many are unidentified, but they include shots of African, Indian and European workers on factory floors, a laundry, clearing land with heavy machinery, constructing a dam, laying the Mombasa pipeline (Public Works Department), refuelling aircraft and scenes of a slaughterhouse (believed to be owned by the Kenya Meat Commission) and a mine underground. Some of these images, including the airport ones, show participants in the Stanvac Ltd training scheme and there are also scenes in named businesses including Allsops Brewery (interior and exterior shots). There is also a series of images of the processing of sisal, used as a "picture story" showing the stages from cultivation and harvesting of the crop through to rope production in a factory. Finally there is one miscellaneous enlargement from the SS Kenya images in 2001/090/1/3/1 which shows a North African man holding Trotter's camera.