Early 19th century: small, able to pull a little bit, good replacement for wagon trains in power. Small boiler, a couple driver wheels, maybe some pilot wheels. Whistle that goes "tweet tweet". A noble beast.
She was recovering from a C-section and, with tears in her eyes, apologized because she didn’t even have the strength to get up and throw away a dirty diaper. I told her she had absolutely nothing to apologize for.