Investigations
If I am traveling west in the 1800s, I could infer that...
Life will be hard since there are so many obstacles and even one little mistake can set you back for days.
If I am on a elevated railway on third ave in New York City, I could infer that the date is...
Somewhere around 1879 or the late nineteenth to early twentieth century. (The elevated railways along third ave were terminated and destroyed around the 1940s)