Mr Casby lived in a street in the Gray’s Inn Road, which had set off from that thoroughfare with the intention of running at one heat down into the valley.
Little Dorrit, chapter 13

What does the term "one heat down" mean?

  • 1
    It's not "one heat down", it's "at one heat" + "down into the valley". The concepts are separate. Apr 4, 2022 at 21:16

1 Answer 1


Per World Wide Words, heat once had a meaning of

a single burst of intense physical activity of any sort, often in the phrase at a heat, at one go, in one continuous operation

(World Wide Words cites the Oxford English Dictionary for this, but I do not have an unabridged OED handy.)

Note that the particular phrase Dickens uses—at a heat—is specifically called out here. And World Wide Words goes on to note that this meaning can be found “as late as 1855,” citing one John Lothrop Motley. Little Dorritt was published serially from 1855-57, so at the same time.

So this is the sense the word has in the quoted sentence: the point of the street was to be able to run down from the thoroughfare and into the valley in one burst of effort, rather than a prolonged journey that might possibly involve stops along the way. In other words, a direct route, where the route otherwise would be meandering, with larger detours.

Put another way, the quoted sentence means

Mr Casby lived in a street […] which [led directly down into the valley from Gray’s Inn Road].

Note that this meaning of heat is no longer used, hence “as late as 1855.” However, modern English does bear one vestige of that meaning: the modern use of heat for a single race within a tournament (where the earlier heats might be used as qualifiers for the finals, or competitors’ final standing is determined by some kind of averaging across their various heats, or what have you). According to World Wide Words, this sense came about by combining the “one continuous operation” sense of heat with another usage of heat, specifically in horse racing, to mean what we would call a warm-up today.

  • 1
    The term "at one heat" would come from metalworking, probably blacksmithing. Heat a piece of iron red hot, and it's soft enough to shape with a hammer ... until it has cooled too much, when it goes into the forge to heat again. If you're skilful, or the job is simple, you can do it at one heat. Apr 4, 2022 at 21:40
  • 1
    @user_1818839 Maybe! I’d need some kind of authoritative source for such a connection before I’d add it to the answer, though.
    – KRyan
    Apr 4, 2022 at 21:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.