- 1867 Steam Cycle Replica - National Motorcycle Museum
- Historic steam-powered motorcycle at Las auction - Autoweek
- Roper steam - Wikipedia
- Roper Steam about | Museum of History
- 1896 steam bicycle replica sale
- 1886 Roper | Volo Museum
- 1863 Roper Steam Carriage William Eggers Motorcycles
- Sylvester Roper's Velocipedes | Vintagent
- 1867 Steam Cycle Replica - National Motorcycle Museum
- Roper Steam about | Museum of History
- 1867 Steam Replica | William Eggers Motorcycles
- Sylvester Roper's Velocipedes | Vintagent
- Roper Steam 14
- Sylvester Roper's Velocipedes | Vintagent
- Roper Steam 14
- Roper Steam Powered Velocipede
- Roper Steam about | Museum of History
- Roper Steam Powered Velocipede
- 1863 Roper Steam Carriage William Eggers Motorcycles
- Roper's Powered Motorcycle - Steam Culture - YouTube
- The FIRST Steam in world, ROPER 1869 year! - YouTube
- Historic Roper Steam-Powered Motorcycle Expected to Set World | Motorcycle Cruiser
- 1867 Steam Cycle Replica - National Motorcycle Museum
- Sylvester Roper's Velocipedes | Vintagent
- 1863 Roper Steam Carriage William Eggers Motorcycles
- Roper Steam 1
- Roper steam - Wikipedia
- 1867 Steam Cycle Replica - National Motorcycle Museum
- Cycleweird: Roper Velocipede