The abbe and Edmund vied with each other in keeping up the spirits of the garrison with successful little forays with the Danes, frequently crossing the river to the one bank or the other, sometimes with parties of only five or six men, and falling upon similar bodies of the enemy. Several times they pounced upon small herds of the enemy's cattle, and driving them into the river, directed them in their boats across the stream.

In the commencement of July Eudes appeared on the slopes on Mont Martre with three battalions of soldiers. The enemy, who were for the most part on the other side of the Seine, crossed the river. A desperate battle ensued. A portion of the garrison crossed in boats to the assistance of their friends, Edmund leading over his band of Saxons. With these he fell upon the rear of the Danes engaged in fighting with the force under the count, and the Northmen, attacked on both sides, gave way and took to flight. They were hotly pursued by the Franks.

The reinforcements entered Paris triumphantly by the bridge, which had long since been repaired. But the siege was not yet over. When the news of the victory of Eudes spread, the Danes again drew together from all parts, and crossing the river, attacked the city on every side. The onslaught was more furious than any which had preceded it. The Danes had provided themselves with large numbers of mangonels and catapults. Every man capable of bearing arms was upon the walls; but so furious was the attack, so vast the number of the assailants, so prodigious were the clouds of missiles which they rained upon the walls, that the besieged almost lost heart.