J.R. Oliver + W.T. Bell - 1861

Mona Caesaris vel Insula Manniae (facies Antiqua)
Johannes R. Oliverius Descriptit. Gulielmus T. Bell Excudit.
1861
Size: 280mm x 190mm

N to top;no compass;circular inset view Port Skillion bottom rh (no obvious reason for inclusion of this)
Latinised names; combines old + new outlines of island (supposedly showing coastal erosion) - areas outlined in colour.

John R Oliver was a Physician born c.1821 Lisburn Ireland and a graduate of Edinburgh University - in 1861 census living with wife (Elizabeth born Manchester)and three children in Athol Street Douglas - all born London though a large gap between eldest 2 (12 + 13 yrs)and the 1 year old daugher. Had 3 servants, footman, cook and housemaid.
William T Bell is likely to be the unmarried 28 year old Scots born Civil Engineer living with his parents James & Mary (James a retired Civil engineer) at Mount Vernon Onchan in 1861;

Bound with volume of translated documents relating to IoM - W.T. Bell gives the following explanation

EXPLANATION OF MAP.

The outline of coast within the Blue and Red limits, with the exception of the Lake boundaries indicates the present outline of the Island.

The sea current running with great force from Peel northward to Jurby Point has gradually washed away the drift gravel formation, and deposited a portion of the same at the Point of Ayre. Several other changes from similar causes have taken place at Shellack Promontory, Langness, and Niarbyl Point.

In the arrangement of the work I have been guided by the Admiralty, Speed's, Bullock's, and Drinkwater's maps.

The area of the large tracks of land washed away by the sea in the N.W. and other parts of the Island is computed from private Estate Plans and the Tithe Maps deposited Rolls Office.

That portion of the Island from 54° 20' northwards, indicated by horizontal lines, represents low marshy ground.

The land (marked red) at the Point of Ayre and Douglas Bay is of recent formation.
W. T. B.

Extracted From

Oliver' Monumenta Vol II - Manx Soc Vol VII Douglas: 1861