Over the course of the 19th and early 20th centuries, these amalgamated or were bought by competitors until only a handful of larger companies remained ( see railway mania ).
Over the course of the 19th and early 20th centuries, these amalgamated or were bought by competitors until only a handful of larger companies remained ( see railway mania ).
Over the course of the 19th and early 20th centuries, most of the pioneering independent railway companies amalgamated or were bought by competitors, until only a handful of larger companies remained ( see Railway Mania ).
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