Winslow —The Mapping of Missouri. 71 
they must be far in advance of anything preceding in their 
representation of the river. The writer was unable to find 
the volume in the accessible libraries, and, hence, is unable to 
present a sketch of the map here.* 
In the year 1765, Lieut. Ross of the British army made a 
survey of the lower Mississippi river, and, in 1775, his map 
was published on a scale of about 14 miles to the inch, under 
the title of «* A Map of the Mississippi River, from Balise to 
Fort Chartres. Taken on an expedition to the Illinois in 
1765, by Lieut. Ross of the Thirty-fourth Regiment. Pub- 
lished 1775, London, for Robt. Sayres.’’ The sketch on the 
next page is from a copy of this map in the Mo. Hist. 
Soc. library. This is a very interesting map and exhibits 
a great advance in the cartography of the river. The main 
sinuousities of the river are quite true to nature and are in ac- 
cord with maps of recent date.t The latitude of the mouth 
of the Ohio river is shown to be a few minutes less than 37 
degrees, which is closely in accord with recent determinations, 
which make it exactly 37 degrees. The longitude of New 
Orleans, shown on the map, is, however, about 50 miles east 
of what it should be. The note, west of the river, of, «A 
country abounding in mines,’’ suggests a translation of the 
‘* Pays plein de Mines’’ on the Delisle map of 1707. 
Faden’s Atlas of 1777, is entitled ‘* The North American 
Atlas. Printed for William Faden, Geographer to the King, 
MDCCLXXVII.”’ | The scale of the maps is about 80 miles 
to the inch. It shows the Mississippi and Missouri rivers, and 
some of their tributaries. Nothing in advance of the other 
maps described was noted, however. 
Thomas Jeffery’s American Atlas was published in London 
* Mr. Oscar Collet, librarian of the Mo. Historical Society, states that 
there is a copy of this work in the library of the Illinois Hist. Soc. at 
Springfield, and another in the possession of Mr. H. H. Beckwith of Dan- 
ville, Ill. 
+ A careful comparison of this map with the recent charts of the Mis- 
Sissippi River Commission, made by Capt. Palfrey, confirms this statement 
and shows that the course as delineated by Ross occupies, in some places, 
the lakes and sloughs of the present alluvial plain. 
} A copy of this atlas, belonging to Capt. C. F. Palfrey, was inspected by 
the writer. 
