Simplify the following text for a Grade 14 native English-speaking person.
Original: Saugor was the seat of a Maratha governor , and the northern portion of the territory was ceded by the Maratha Peshwa , the southern portion , which included Jabalpur and the upper Narmada River valley , was ceded by the Bhonsle maharaja of Nagpur .
Simplified: Saugor was the seat of a Maratha governor , and the northern part of the territory was given to the British by the Maratha Peshwa , the southern part , which included Jabalpur and the upper Narmada River valley , was ceded by the Bhonsle Maharaja of Nagpur .