Have you found this yet? Your message doesn't specify that you've found the Graham family living in Milwaukee through the census records. Wisconsin has a 1905 State Census that is part of online vendor collections available through many libraries and that would help narrow down years for her death. Death registrations in Wisconsin are filed at the local and state level, and the state index is available up through 1907 online through the Wisconsin Historical Society site www.wisconsinhistory.org
, and online vendors. Milwaukee County death registrations are found in local library collections up through 1911-1912., otherwise in Milwaukee County Register of Deeds vital records office.