Trevithick later demonstrated a locomotive operating upon a piece of circular rail track in Bloomsbury, London, the Catch Me Who Can, but never got beyond the experimental stage with railway locomotives, not least because his engines were too heavy for the cast-iron plateway track then in use.
Trevithick kemudian mendemonstrasikan sebuah lokomotif yang beroperasi di atas jalur rel melingkar di Bloomsbury , London, Catch Me Who Can , tetapi tidak pernah melampaui tahap eksperimental dengan lokomotif kereta api, paling tidak karena mesinnya terlalu berat untuk lintasan besi cor.