Final answer:
The correct option is 2) Aunt Cilla had passed away. The excerpts do not provide enough information to determine what the children found out at Aunt Cilla's house; hence none of the options can be confirmed.
Step-by-step explanation:
Based on the given excerpts, the question seems to be related to the narrative of a story, likely from a work of English literature. The information provided does not include details about children visiting Aunt Cilla's house, or any events that transpired there.
Hence, we cannot accurately determine what the children found out upon arriving at Aunt Cilla's house, whether it be a cousin named Eunice, Aunt Cilla's passing, or having a grandmother in Maryland. None of the provided excerpts point directly to these specific facts, as they seem to come from different stories and contexts. Therefore, it would appear that none of the options (1, 2, 3, or 4) can be substantiated by the given references.