|This article is about the magazine story. You may be looking for the episode or the Buzz Book.|
BoCo the Diseasel is a magazine story.
Bill and Ben are twin tank engines with four wheels, a tiny chimney and dome, and a small squat cab each. They keep busy pulling the trucks of china clay on the main line to the ships in the harbour. One day the twins shunted some trucks and went off for more, but when they come back - the trucks they have shunted were gone! But all was left is a patch of diesel oil, and the twins were puzzled about it - believing it as "the diseasel". Their drivers tell them that they will go and get their trucks back from the diesel.
They also tell the twins that they will take away their names and numbers, and after that - the twins set off to find the diesel. Sure enough they both found the diesel on a siding with the missing trucks, and while Ben hid behind - Bill went boldly alongside the diesel and asks him if he want his trucks back. But the diesel denies the request and tells Bill to go away, Bill pretends to be frightened and hid away behind the trucks - then Ben comes forward on the other side. And as Ben runs away, Bill takes his place and it continues until the diesel begs each one to stop as his eyes nearly popped out!
Soon the diesel realises that the two identical engines were in fact twins and groans, then Edward arrives and wonders what the twins were playing at. The two engines tells him that the diesel takes their trucks without asking, but Edward reassures them that the diesel is a "Metropolitan Vickers Diesel-Electric, type two". Bill and Ben were abashed and the diesel introduces himself as BoCo, while apologises for not understand about the trucks. And as the twins scampers away, Edward reassures BoCo that there is no harm in the pair - but they are maddening at times.
- In the final illustration, BoCo appears to have two sets of eyebrows, and Edward appears to be larger than BoCo.