412 
FLORA OF ADEN. 
Haines, S. B. Memoir of the South and East coasts of Arabia. 
( Journ . Roy. Georgr. Soc. xv {1845) , p. 104 — 160.) 
Halevy, J, Voyage au Nedjran. {Bull, de la Soc. de G4ogr. T 
1873 , vi.) 
Halevy, J. Voyage dans PArabie centrale. {Bull, de la Soe. de 
Geogr., 1884-85.) 
Hanbury. Botanical origin and country of Myrrh. (. Pharmac . 
Journ. April 19th, 1873.) 
Harms, H. Leguminosse Africans. 3 parts. Leipzig, 1899 — 1901. 
Harris, W. A journey through the Yemen and some general 
remarks upon that country. London, 1893. 
Ileill, W. Ein Beitrag zur Statistik Siidarabiens. {Mitteil. d. K. 
K. Geogr . Ges. Wien . xlvi {1903) , p. 219 — 264.) 
Hempricli, W. F. & Ehrenberg, C. G. Reisen in iEgypten, Libyen, 
Nubien und Dongola. vol. 1. Berlin, 1828, 
Heugliil, T. von, Reise langs der Somali-Kuste im Jahre 1857. 
{Petermann’s Mitt eilun gen {I860), p. 418 — 437.) 
Hiern & Rentlle. Catalogue of the African Plants collected by 
Welwitsch in 1853—61, 2 vols. (5 parts). London, 1896 — 1901. 
Hildebrandt, J, M. Ausflug in die Nord-Abessinischen Grenzlander 
im Sommer 1872. Mit 1 Karte. {Zeitschr. d. Ges. f. Brdic. Berlin, 
viii {1873), 6. Heft.,p. 449—471.) 
Hirscli, L, Reisen in Siidarabien/Mahra-Land und Hadramaut. 1897. 
Hogarth, D. G. The Penetration of Arabia. A record of the develop- 
ment of Western knowledge concerning the Arabian Peninsula. London, 
1904. 
Hogarth, D. G. Problems in Exploration. I. Western Asia. {Geogr. 
Journ. London , xxxii {1908), p. 549.) 
Hooker, J. D. (Extracts from the private letters of Dr. Hooker 
written during a Botanical Mission to India.) {Hooker’s Lond . Journ . 
of Bot.vii, {1848), p.297.) 
