Kooran, it looks like you did find a relative.
1881 British Census, Minerva House, York:
Robert Sarge, head, 49, born York, England, engineers accountant (civil)
Eliza Sarge, wife, 39, York
Emily E., daughter, 17, Copmanthorpe, York
Robert W., son, 16, Copmanthorpe, York, coal merchant jun (clerk)
Robert A., son, 4, York
Eliza G., daughter, 14 Copmanthorpe, York
Mabel M., daughter, 2, York
My Henry Thomas was born in York. His father was John and Henry had a brother named Robert (possibly Robert William).