Job of Census enumerators in the 19th century - not much has changed - a puzzle

The message <41n3k5F1fhiqtU1@xxxxxxxxxxxxxx>
from Hugh Watkins <hugh.watkins@xxxxxxxxx> contains these words:

> I often wonder if they rode a horse to get round the rural areas

What is noticable in Threlkeld is that they went round the parish in a
logical manner - not always the same route but normally logical.

This has been valuable in trying to identify which house of the umpteen
"Threlkeld Village" addresses is which.

It enabled me to identify (with minimum remaining doubt) the location of
"The Castle". It appears on the tithe map (unidentified) and must have
been very small and possibly only one room.

I have had a suggested explanation for such a name being given to such a
building, but would you like to have a go?

Additional information:

Threlkeld was then basically a linear village, nestling under Blencathra
(or Saddleback) in the Cumberland fells, partly on the main east-west
turnpike road and partly on a road running off it in a northerly
direction steeply up towards the fells.

The Castle is the last but one house on this latter road (the last one
is a substantial farmhouse and steading)

Above that nowadays (and then) there are enclosed fields before the fell
wall is reached and the ground rises much more steeply.

The farms at the tithe map time (including this one) were arable and
stock and the stock would have been (as now) sheep and cattle.

There was a very successful lead and zinc mine on the eastern outskirts
(but this is probably irrelevant)

Stuart
.