Final answer:
The size of Sneffels is not directly mentioned by anyone named Henry. The name likely refers to the volcano Sneffels in Jules Verne's 'Journey to the Center of the Earth'. Real-life counterpart of Sneffels may be Snaefellsjökull, which is 1,446 meters tall.
Step-by-step explanation:
The size of Sneffels is not directly mentioned by a character named Henry since there is likely a misunderstanding or mix-up in the question. However, if the reference is to Jules Verne's novel 'Journey to the Center of the Earth,' Sneffels is the name of a volcano in Iceland, which is central to the story's plot.
Snaefellsjökull, which Sneffels may be based on, is a real-life stratovolcano that rises 1,446 meters above sea level. In the novel, an extinct volcano by the name of Sneffels is the entrance to subterranean passages.
To accurately answer questions about literary characters or settings, it's important to refer directly to the source material or any available secondary analysis of the text.
The question asks about the size of Sneffels according to Henry.
However, the information provided does not specify what or where Sneffels is, so it is not possible to determine its size or location.
In order to provide an accurate answer, more context or clarification is needed.