Gerard Thijsse
Miquel was more liberal in distributing duplicates. From the annual report of the Rijksherbarium for 1863/1864 we learn that in 1863 Miquel started to send duplicate specimens for exchange with foreign institutions such as Kew, Vienna, Berlin, Stockholm and St. Petersburg. It is not clear whether Japanese plants were included. In 1863 duplicate specimens for educational purposes were sent to the Athenaeum in Amsterdam (now University of Amsterdam), the Universities of Groningen and Utrecht, and others (Miquel, 1864). In the herbaria of Amsterdam and Utrecht (now the Utrecht branch of the National Herbarium of the Netherlands) Japanese plants originating from Leiden are still present. Yamaguchi (2003: 3) estimates that some 1,500 Japanese duplicates may be present there.
In 1865 Miquel could state in his annual report that all Japanese collections were now identified and that numerous duplicates were ready to be distributed. In the annual report of 1866 it is mentioned that the numerous duplicates, especially those of Bürger were important in the exchange programme with sister herbaria. As in earlier years, that year also duplicates were sent to several Dutch institutions. In 1868 most of the available duplicates were distributed (Miquel, 1868).