In the case of In re Grossmayer, 1899, the petitioner was a naturalized citizen who had returned to his native Austria and resided there for over two years. The US government sought to cancel his citizenship on grounds that he had taken up permanent residence in another country after being naturalized. However, the Supreme Court ruled in favor of Grossmayer stating that once an individual has been granted U.S. citizenship through naturalization, it cannot be revoked simply because they chose to live abroad for some time. This decision reinforced the principle that American citizens have a right to travel and reside wherever they wish without losing their nationality unless they voluntarily renounce it or commit acts which are specifically mentioned by Congress as grounds for expatriation.

The dissenting opinion in the case of In re Grossmayer, Petitioner, 1899 is not readily available. This particular Supreme Court case does not appear to be widely referenced or discussed in legal literature and databases. It's possible that this case may have been overshadowed by other cases during that time period or it might not have had a significant impact on U.S law. Therefore, without access to more detailed records or archives from the late 19th century, providing a summary of any potential dissenting opinions for this specific court case would be speculative at best.