1      Jellicoe, Sir Geoffrey and Susan Jellicoe (consult. eds.) and Patrick Goode and Michael Lancaster (exec. eds.)  The Oxford Companion to Gardens (Oxford University Press, 1986),  pg. 196;

The Marshall Cavendish Illustrated Encyclopedia of Plants and Earth Science (Bellmore, NY: Marshall Cavendish Corporation, 1988, reference edition published 1990), Volume 6, pg. 684. 

2     Fortune Robert Three Years' Wanderings in the Northern Provinces of China (New York: Garland Publishing, Inc., 1979, reprint of the 1847 edition published by John Murray, London, a title in Garland's 'The Modern Chinese Economy Series (The Late Imperial Period)' edited by Ramon H. Myers, Hoover Institution).  The provinces actually were Zhejiang, Jiangsu, and Anhui, mostly along the southeastern coasts of China, but essentially north of the Western settlements.   The gardens of the Mandarins quote, pp. 94-98; also partially quoted in Behme, Robert Lee  Bonsai, Saikei and Bonkei: Japanese Dwarf Trees and Tray Landscapes  (New York: William Morrow and Company, Inc., 1969), pg. 9 and Resnick, Susan M. Bachenheimer  Bonsai (Boston: Little, Brown and Company, 1991, 1992), pg. 14; The only tree which I met quote, pg. 129; I lost no time in visiting quote, pg. 154; The Soo-chow nurseries quote, pg. 260.  A digitalized version of the second edition is here.

Johnson, Hugh   The International Book of Trees (New York: Simon and Schuster; 1973),  pg. 49, has a small b&w photo of Fortune;

Bretschneider, Emil  History of European Botanical Discoveries in China (Leipzig: Zentral-Antiquariat; 1981, reprint of the original 1898 edition), pp. 404-517, which also mentions correspondence published in the Gardener's Chronicle and Journal of the Hort. Society.  It is not known if there were any dwarf tree references in these that were not also in Fortune's four books;

cf. Keswick, Maggie Chinese Garden: History, Art & Architecture (New York: Rizzoli International Publications, Inc.; 1978, Academy Editions, London), b&w fig. 49, pg. 54 of a "Deer-shaped tree, nursery garden, Hangchow.  Deer are a Chinese symbol for long life..."

3      Fortune, Robert   A Journey to the Tea Countries of China  (London: John Murray, 1852), On visiting some of the flower-shops quote, pp. 121-122, A few days after visiting quote pp. 327-329, Before leaving these quote, pp. 334-335.  Per pp. 4-5, between 1843 and 1845 there was a great mortality which hit the British troops stationed there.  After 1845 there were many changes to Hong Kong, dense building of houses, and interest in gardening and planting.  The latter improved the particularly hot climate with softness and coolness.  Per pg. 21, he went inland himself because of the uncertainty that his hired Chinese agent did get tea plants from the interior as requested (rather than a few miles inland at the nearest tea district), and to see for himself the best modes of cultivation and the nature of the soil of the interior district; Bretschneider, History, pg. 450, gives part of the Wistaria quote.

4      Fortune, Robert  A Residence Among the Chinese (London: John Murray, 1857), [The less known Howqua's Garden] quote, pp. 214-215; I have already noticed quote, pp. 275-275.  Per pg. 144-146, in addition to tea seeds, large quantities of chestnuts and seeds of Cryptomeria japonica, green-indigo (which yielded a dye attracting much attention in France at the time), and many others were collected, which by the late 1850's were flourishing on the slopes of the Himalayas in the northwestern provinces of India.

5      Fortune, Robert Yedo and Peking, A Narrative of A Journey to the Capitals of Japan and China (London: John Murray, 1863), There are also a number quote pp. 2-3; [In Nagasaki] quote, pp. 11-12; On the side of a hill quote, pp. 16-17; On our way home quote, pp. 22-23, note that Fortune makes no comment or insinuation that this dwarf fir-tree (or the dwarf trees in the first quote, for that matter) was in any type of a container outside of the ground; The capital of Japan et al quote, pp. 103, 108, 109-114.

       The [In Nagasaki] quote actually appears two years earlier in French in a translation of Fortune's correspondence, as the sixth of nine paragraphs in "Le Japon -- L'Habitation De Von Siebold; Les Jardins De Nangasaki" by Em. Rodigas in the Miscellanées section, Flore Des Serres et Des Jardins de L'Europe: Journal Générale D'Horticulture, Volume 14, 1861, pg. 94.

       A review of Yedo and Peking can be found in The Athenæum, a weekly periodical published in London between 1828 and 1923, covering a wide range of topics in literature, fine arts, music, theatre, politics and popular science.  The particular review was apparently written by William Hepworth Dixon, editor of The Athenæum from 1853 to 1869, and printed on pg. 1848, March 28, 1863 (per title near bottom of list http://www.soi.city.ac.uk/~asp/v2/contributors/contributorfiles/DIXON,WilliamHepworth.html.)

       That review was reprinted in The Living Age, No. 986, April 25, 1863, on pp. 186- 188:  "The art of dwarfing trees" paragraph above (third last paragraph) is given on the third page of the review, having been preceded by the following:  "On the art of dwarfing plants -- an art which is beginning to find much favor [sic] in our own greenhouses -- [Fortune] is a more confident and competent  authority.  Many readers will like to learn the lesson from the original source -- the more so as they can do so in a passage variously suggestive:"
       (The Living Age, aka Littell's Living Age, was a mostly weekly American general magazine largely consisting of selections from various English and American magazines and newspapers.  It was published between 1844 and 1941 in New York.)