Arrived at Rathmullen they found Maguire and Captain Bath laying stores of provisions on board the ship that had come into Lough Swilly under French colours.

Here they were joined by Rory, Earl of Tyrconnel.

At noon on Friday they all went on board and lifted anchor, but kept close to the shore waiting for the boats' crews, who were procuring water and fuel; but they had to wait till long after sunset, when the boats came with only a small quantity of wood and water.
According to a fatality which makes one Irishman's extremity another Irishman's opportunity, the foraging party was set upon by M'Sweeny of Fanad, who churlishly prevented them getting a sufficient supply of these necessaries.

This barbarous conduct is accounted for by Mr.
Meehan, from the fact, that this M'Sweeny had recently taken a grant of his lands from the crown.

At midnight, September 14, 1607, they spread all sail and made for the open sea, intending, however, to land on the Island of Arran, off the coast of Donegal, to provide themselves with more water and fuel.