Debby, you would have to give me more information. Jewett is a common name and there were several families who settled in Skagit and Snohomish counties in Washington. Where was your father born and when? Do you know where your grandfather was from? "Harry" is often a nickname for "Henry". Email me at delormegenealogy@yahoo.com and I will see if I can help you. My Jewetts came from Illinois and Missouri to Washington.
Linda