Instead, therefore, of fighting again, the two commanders entered into negotiations.

Hubba was the name of the Danish chieftain.

In the end, he made a treaty with Alfred, by which he agreed to retire from Alfred's dominions, and leave him in peace, provided that Alfred would not interfere with him in his wars in any other part of England.

Alfred's kingdom was Wessex.
Besides Wessex, there was Essex, Mercia, and Northumberland.

Hubba and his Danes, finding that Alfred was likely to prove too formidable an antagonist for them easily to subdue, thought it would be most prudent to give up one kingdom out of the four, on condition of not having Alfred to contend against in their depredations upon the other three.
They accordingly made the treaty, and the Danes withdrew.