 They met with RYM supporters in the Northeast and Midwest, as well as with more mainstream SDSers.When the SDS National Convention opened in Chicago on June 18, 1969, Jacobs' manifesto, "You Don't Need a Weatherman to Know Which Way the Wind Blows," was published in the SDS newspaper, New Left Notes.Although the other 10 SDS leaders had contributed to the document, Jacobs was the primary author of what came to be called the "Weatherman manifesto."