Simplify the following text for a Grade 11 native English-speaking person.
Original: These were supplemented by a 2-4-2T , Lyn , built by the Baldwin Locomotive Works of Philadelphia , USA , as the Company realized that three locos would be insufficient .
Simplified: These were supplemented by a 2-4-2T , Lyn , built by the Baldwin Locomotive Works of Philadelphia , USA , as the company realized that three engines would not be enough .