sentences:  Clark, however, concluded that the legislative history of Section 1461 clearly permitted postmasters to refuse mailed materials which were known to be obscene.Since subsequent investigation by the Post Office Department had confirmed that the advertisers in the magazine sold obscene materials, the materials published by Womack could be seized.For the dissent, the fact that postal regulations had been in existence since 1902 without challenge weighed heavily in favor of this interpretation of the legislative history.