In 1885 Russia moved to take the Afghan city of Herat, which the British regarded as the "key of India". Marvin wrote and published this emergency international affairs analysis in eight days. His purpose was to garner support from the British government for military action--up to and including war--against Russia before it took Herat. Marvin believed that the Russians were aiming for India and his analysis is framed as such. At the time of writing,...