Source Data Reference for:
City = Merthyr Tydfil
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Merthyr Tydfil | 1831 | 60,000 | Rough Guide | Wales | p83 | ||
| Merthyr Tydfil | 1831 | "more than Cardiff, Swansea & Newport combined" | Rough Guide | Wales | p83 | ||
| Merthyr Tydfil | 1850 | 61,000 | Tertius Chandler | Four thousand years of urban growth | p24 | ||
| Merthyr Tydfil | 1850 | 46,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Merthyr Tydfil | 1865 | 100,000 | passed for the 1st time | Tertius Chandler | Four thousand years of urban growth | p542 |