You should consult a probate or estate planning attorney to carefully review the terms of the will. Based on how you stated the will reads, it seems the personal property in the Aunt's house was indeed devised (given) to her. The key words here are: "with the improvements and contents of any improvements to". Improvements include houses, barns, etc., that are placed upon land. The "contents of any improvements" would suggest to mean the personal property contained within the house or other improvement.
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Although the quoted language is helpful, we cannot really interpret a Will without reading the entire Will. Also, we are not rendering legal opinions on this site. There is no attorney/client relationship and to get a real opinion, you need to consult with an experience probate lawyer. The Will must be probated to have any effect whatsoever. The judge would then interpret it, if there is a dispute as to its meaning. The Independent Executor appointed by the court will administer the estate and ultimately distribute the assets according to the terms of the Will. Having said all that, I think the most likely interpretation is that the items in the house go with the house and things built on the land go with the house on that land.
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I would agree with Mr. Koel and Mr. Paxton that I would need to read the entire Will prior to rendering a more conclusive opinion. That said, based solely on the information shared by you, it would suggest that your interpretation is correct and the personal property should NOT go with the house, but instead is separate and distinct from the real property.
I would reiterate however that without reading the entire Will, it is difficult to say conclusively how your Grandfather intended his property to be distributed amongst his heirs. Moreover, a Court may interpret the Will differently than I would, and the Court's opinion will really be the only one that matters.
You would benefit greatly by engaging competent legal counsel in this subject area. Good luck with your endeavor.
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