Question: Which castle south-southwest of Montrose is named after the red sandstone it's built from?
Sentence (from "Abenhall"): In the west tower is a spectacular new window installed 14 April 2011 by stained glass artist Thomas Denny; presented by the current free miners of the Forest of Dean to represent their gratitude and present day continuation of the ancient local customs of coal, iron ore and stone mining.
Relevant evidence: No