After his trip to Germany, Arthur went straight to Russia, visited Tsar Nicholas II and Duke Sergei, and saw the still bedridden Crown Prince Aleksei.
There was no alternative; perhaps this was the trouble with having many relatives. Both Germany and Russia had close familial relations with Arthur, and their relations were also very friendly between the countries, which meant that Arthur had to move about more.
Moreover, both Germany and Russia could provide a lot of help to Australasia, and their status as powerful nations is precisely what Australasia currently lacked in allies.
Of course, the tangible help that Russia could provide to Australasia at this time was not much, perhaps the most useful would be the endless stream of Russian immigrants.
During his few days in Russia, Arthur signed a new immigration treaty with Nicholas II.