It's going to depend very much on what state you are in. First, IF the dated note was made before the will, AND the will specifically referred to the note, then it will be valid in any state as an 'incorporation by reference.' But, even if it was made after the will, it will be valid in Uniform Probate Code (UPC) states -- about 30 states, as long as it was signed by the testator. Either way, it is not technically called a 'codicil.' As to whether you have to carry it out, again it depends on your state law. As to your second question, I'm assuming your discussing "total estate" for the purpose of federal estate taxation. If so, then yes ALL PROPERTY is technically included in the "gross estate." However, practically speaking, if the item are of little value -- no single piece > $3,000 and total not > $10,00 then unless you sell the items as executor, you probably do not need to report it on the estqte tax return. By the way, what state are you in? I am in Illinois...if you are in IL, I can give you a more specific answer as to the will question. Good luck.