George Cohen, In Search of Netsuke and Inro (Birmingham: Jacey Group, 1974), pl. 329.
The design for this inro is taken from the print Ochanomizu tsuribito (Fishermen at Ochanomizu) from the series Edo meisho dogi zukushi (Joyful events at famous places in Edo) by Utagawa Hiroshige II (1826-1869), published by Tsujiokaya Bunsuke in 1859.
For a reference to this inro, see E. A. Wrangham, The Index of Inro Artists (Alnwick: Harehope Publications, 1995), pg. 194, under the entry for Nakayama Shibayama.