From the Electoral Boundaries Act:
Commencing at the intersection of the Bannockburn Road (Route # 247) and Route # 225; thence westwardly along said Route # 225 to the Darlington Road (Route # 226); thence northwardly along said road to the Johnston Road (Route # 227); thence westwardly along said road to the Hopedale Road (Route # 13); thence southwardly along said road to Route # 225; thence westwardly along said route to the county line between Prince and Queens County; thence southwardly along said county line to the South Shore Villa property; thence following the South Shore Villa property east, south and west back to the county line; thence southwardly along said county line to the shore of the Victoria Harbour; thence southwardly along said Harbour to Northumberland Strait; thence eastwardly along said strait to the mouth of Charlottetown Harbour; thence northwardly along said harbour to the West River; thence westwardly along said river to the Clyde River; thence northwardly along said river to the Trans Canada Highway (Route # 1); thence eastwardly along said highway to the Linwood Road; thence northwardly along said road to the Kingston Road (Route # 235); thence westwardly along said road to the Bannockburn Road (Route # 247); thence northwardly along said road to Route # 225 to the point of commencement and includes St. Peters Island.
Using the Elections PEI API, you can obtain the data on this page in XML format at: