"These are to desire you to appoint my Grand Father"

I've been using the recently released probate files for Middlesex County, Massachusetts on American Ancestors (http://www.americanancestors.org) and have been making some interesting discoveries, including this little gem:

Simon hopefully would be a good source for the identification of his grandfather as Joseph Daby. I need to research Simon's parents as completely as possible first, but researching Joseph Daby may help me in locating information on Simon's parents.

I'm not exactly certain that the document should be transcribed as "These are to desire you to appoint my GrandFather Mr. Joseph Daby of Stow for my Guardian." The phrase "These are to desire" seems oddly phrased.