188 It 0 H 
union of the churches in my presence ; it is a sacred oath, 
and you ought to keep it inviolable. Though there should 
be only two persons of our religion, I will be one of the 
two. My houses and revenues are seized; but my sword 
and life remain, and I will employ both in your defence.” 
The siege was raised, and in the following year a favourable 
■peace was granted to the Protestants. The war was rekind¬ 
led in 1625, in consequence of violations of the late treaty, 
but was soon terminated by a peace on the former condi¬ 
tions. At length Richelieu resolved entirely to subdue a 
party which had become a sort of separate republic in France, 
allied for its own defence with her enemies. He laid siege 
to Rochelle, the strong hold of the Calvinists, and at length 
took it; and though the Duke of Rohan vigourously main- 
- tained the war in Languedoc, he was in fine obliged in 
1629 to make his submission, and the party was deprived 
of all its .fortresses, but still allowed the public exercise of 
its religion. As it was one of the conditions that he should 
quit the kingdom till it pleased the King to recal him, he 
retired to Venice. It is affirmed in the memoirs of the 
Duchess of Rohan, that, during his residence in this city, 
the Duke engaged in a negotiation with the Ottoman Porte 
for the purchase of the island of Cyprus, with a view of 
settling in it Protestant refugees from France and Germany, 
and that it failed principally through the death of the Patri¬ 
arch Cyril, by whose mediation it was carried on. The 
Venetian republic nominated him its general in chief against 
the Imperialists; but the King of France took him from 
its service to send him ambassador to the Swiss and Grisons. 
At the head of the troops of the latter, he drove the Ger¬ 
mans and Spaniardsout of the Valteline in 1633. He after¬ 
wards defeated the Spaniards on the banks of the lake of 
Como ; but the Grisons becoming suspicious that it was 
not intended to withdraw the French troops from their 
country, rose in arms, and the Duke was obliged to make 
a separate treaty with them in 1637. Apprehending that 
he might incur the resentment of Richelieu on this account, 
he retired to Geneva. He thence went to join his friend 
the Duke of Saxe-Wei mar, with whom he fought against 
the Imperialists at Rheinfeld in 1638. He received wounds 
in the action, of which, some weeks after, he died at the 
abbey of Konigfeld in Switzerland, at the age of 59. His 
remains were interred in the church of St. Peter, at Geneva, 
where a magnificent monument was erected to his memory. 
The Duke of Rohan was one of the greatest. captains of 
his time, and possessed all the qualities requisite in the 
head of a party, together with disinterestedness, generosity, 
and gentleness of manners. He is finely characterised by 
•Voltaire in the following lines: 
Avec tous les talens le ciel J’avoit fait naitre: 
H agit en heros; en sage il ecrivit. 
II fut meme grand homme en combattant son maitre, 
Et plus grand lorsqu’il le servit. 
The Duke was the author of several works, military and 
political. These are, “ Les Interets des Princes ;” “ Le 
parfait Capitaine, ou l’Abrege des Commentaires de 
Cesar;” Un Traite de la Corruption de la Milice an- 
cienne;” “. Un Traite. du Gouvernment des Treize Cantons;” 
“ Memoires,” containing the Transactions in France from 
1610 to 1629 ; “ Recueil de quelques Discours politiques 
sur les Affaires dc l’Etat, depuis 1612 jusqu’a l’an 1629;” 
“ Memoires et Lettres de Henri due de Rohan, sur la guerre 
de la Valteline.” It was one of his projects to divide 
France much in the manner of the modern departments. 
ROHAN, a town in the north-west of France, department 
of the Morbihan. Population 1500; 30 miles north of 
Vannes. 
ROHANPORE, a town of Bengal, district of Mouldab. 
It is pleasantly situated on the eastern bank of the Mahanuddy 
liver, and has risen out of the ruins of Gour. Lat. 24. 48. N. 
long. 88. 26. E. 
ROHAN-ROHAN, a town of France, department of the 
Two Sevres. Population 1900; 6 miles south-south-west of 
Niort. „ • .... 
U O H 
ROHAULT (James), a French philosopher and mathe¬ 
matician of some note in the 17 th century, was the son of 
a rich merchant at Amiens in Picardy, where he was born 
in the year 1620. He studied the writings both of the 
ancient and modern philosophers; but Des Cartes was the 
author who most engaged his notice, and of that great man 
he became a zealous follower. He drew up an abridgment 
and explanation of the philosophical works of Des Cartes, 
entitled “ Physics,” a methodical and perspicuous pro¬ 
duction, and was translated from the French into Latin by 
Dr. Samuel Clarke, who accompanied his version with notes, 
in which the Cartesian errors are corrected upon the New¬ 
tonian system. The fourth and best edition of this trans¬ 
lation was published in 1718, in 8vo. Rohault also pub¬ 
lished “ Elements of the Mathematics; and Dialogues con¬ 
cerning Philosophy,” 1671, ]2mo., on the principles of 
the Cartesian system, which is now considered as entitled 
to little merit. The first Six Books of Euclid; Trigono¬ 
metry ; Practical Geometry ; Fortification; Mechanics; 
Perspective; Spherical Trigonometry; and Arithmetic. 
Moreri. Nouv. Diet. Hist. Hutton?s Math. Diet. 
ROHATYN, a town of Austrian Galicia. Population 
1890; 13 miles west-south-west of Brzezauy, and 22 east-by¬ 
south of Zaleszczyki. > 
ROHILCUND, properly Kuttaher, an extensive and 
valuable district of Hmdostan, formerly belonging to the 
province of Delhi, but now included in the district of Bareily. 
It is situated between the rivers Ganges and Gogra, and 
between the 28th and 30th degrees of northern latitude. It 
is extremely well watered by several rivers, and the soil is 
remarkably fertile. In addition to the productions of other 
parts of Hindostan, it contains woods of valuable timber, and 
whenever it shall be brought to a complete state of cultivation, 
will be the finest part of British India. It contains the 
following towns:-—Bareily, Bissowly, Budavon, Moradabad, 
Owlah, Pillibeef, Rampore, Sumbul, and .several other places. 
Some of the Mahometan princes of the Afghan dynasty 
fixed their residence at Budavon; and if their descendants 
had been wise, they would have erected their capital on the 
eastern side of the Ganges. But this district is better known 
in history, from its having in recent times been occupied, by 
a number of Afghans of the tribe of Roh, or Rohillas. The 
founders of this dynasty were two brothers, named Shah 
Aalum and Hussein Khan, who, having forsaken their 
native mountains of Afghanistan, about the year 1673, settled 
in Kuttaher, where they procured some inconsiderable em¬ 
ployments under the officers of the Mogul emperor. Aurung- 
zebe. The former of these had several sons, the eldest of 
whom, named DoondyKhan, became a celebrated character. 
The latter had two sons, the eldest of whom, named Daood 
Khan, became a soldier of fortune, and collecting some 
followers, was admitted into the imperial service, and having 
distinguished himself, was rewarded with the grant of a small 
district of land in the collectorship of Budavon. Daood 
left two sons, the youngest of whom, Aly Mohammed, 
followed the profession of his father, and was employed by 
the foujedar, or military collector of the province. Taking 
advantage of the absence of this officer, and the distracted 
state of the court of Delhi, he collected a number of his 
countrymen, and took forcible possession of a considerable 
territory, and having soon after espoused the party of the 
celebrated vizier, Kummir Adden Khan, through his influ¬ 
ence fiot only'obtained a confirmation of his posssssions,- 
but also the .title of nabob. Aly Mohammed died in the 
ear 1749, leaving six sons; but as they were all under age, 
e appointed two of his relations, named Rahmet Khan and 
Doondy Khan, guardians of his children, in consequence of 
which the former took the title of hafiz. Between these 
persons, and Shuja Addowlah, nabob of Oude, several 
disputes occurred, which at length arose to such a height, 
that war was declared between them, and the nabob having 
procured.the assistance of the British in the year 1774, 
attacked the Rohillas, and having totally defeated them, 
took possession of the country, and compelled the greater 
number of them to emigrate and gross the Ganges. But tq 
Fyzoola 
