Final answer:
Mr. Solway's knowledge of the tank event is linked to a specific detail or evidence within a literary work. To understand the reason, one would need to analyze the text where these elements are featured, considering the context and narrative techniques that may inform his awareness.
Step-by-step explanation:
The only reason Mr. Solway knows that the tank event happened is likely related to a specific detail or evidence presented within a narrative. Since the name 'Mr. Solway' and the 'tank event' are not widely recognized historical references, it suggests that this question is from a piece of literature or a story being studied in an English class.
Without more context, such as the title of the work or more details about the storyline, it is not possible to give an exact reason why Mr. Solway is aware of the tank event.
However, common literary techniques authors use to inform characters about events include a character being a direct witness to the event, overhearing others talk about it, reading about it, receiving a communication, or through a narrative shift that provides the reader with information that the characters themselves discover later.
For a full understanding, one should examine the specific text in which Mr. Solway and the tank event are mentioned, paying close attention to the surrounding narrative details and character interactions that might reveal how Mr. Solway gained his knowledge of the event.