By the editor's advice, also, several places situate beyond the Eastern
limits of Hedjaz are included in this map; since Burckhardt, although he
did not visit them himself, has given some original itineraries, in
which they are mentioned.

That those places do not belong to the region properly denominated
Hedjaz, is evident; but how far this region extends eastward cannot
easily be determined; and the same difficulty respecting it occurs in
various directions. The editor, that he might ascertain by what
boundaries we are justified in supposing Hedjaz to be separated from
other provinces of Arabia, consulted a multiplicity of authors, both
European and Oriental. The result, however, of his inquiry has not
proved satisfactory; for to each of the neighbouring countries.

[p.viii] certain writers have assigned towns, stations, and districts,
which by others of equal authority are placed in Hedjaz.

Such confusion may partly have arisen from the different statements of
the number, extent, and names of divisions comprised within the same
space; this being occupied, according to European writers, by three
great regions, the Stony, the Desert, and the Happy Arabia; while
Oriental geographers partition it into two, five, six, seven, or more
provinces, under denominations by no means corresponding in
signification to the epithets above mentioned, which we have borrowed
from the Greeks and Romans.

That it would be a most difficult, or scarcely possible task, to fix
precisely the limits of each Arabian province, is acknowledged by that
excellent geographer, D'Anville; but he seems disposed to confound the
region comprising Mekka, Djidda, and Yembo, (places which, as we know,