far / alternative form of 深: chimney of kitchen range
罙
=
⺳
+
木
:
This character looks like a ceiling (top part of ⺳) with a fume hood or the chimney itself below the ceiling (bottom part of ⺳), and below that you have the firewood burning. Sherlock Holmes (sh) arrives at the encampment ((e)n1) to find the pieces of a Christmas tree (木), which is an important piece of evidence in a murder case he has been working on, burning on a fire below the chimney of a kitchen range (罙). Using a butterfly net (⺳) he collects the hot ashes floating out of the chimney to preserve the evidence.