In 1622 Sir Thomas Phillips and Richard Hadsor, a member of the King's Council for Ireland, carried out a survey of Derry which, for the first time, named the bulwarks and Gates of the Walls. They were:

The present-day Butcher's Gate was not named in the survey.
As can be seen eight bulwarks were named and another two positions were referred to later as stone platforms. The four Gates now had strong double planked gates, an improvement on Pynnar's report of 1619. The parapets of the Walls and bulwarks had battlements along their entire length.
The survey pointed out some major deficiencies. It suggested improvements such as: building guardhouses and sentinel towers for the soldiers, installing cannons on wooden platforms in the bulwarks, and supplying powder and arms to increase reserves. It also recommended creating a flooded defensive ditch in the bog area to completely surround the city with water.
Outside Water Gate (Shipquay Gate) a makeshift quay had been built consisting of earth and bundles of sticks. This weak construction had to be constantly repaired due to the action of the tides.
Sir John Vaughan was in command of the 121 families and 110 well-armed men who lived within the walls.