Leaving his people busily occupied with the labors assigned to them at Frederica, Mr. Oglethorpe set out on the 18th of March[53] for the frontiers, “to see where his Majesty’s Dominions and the Spaniards joyn.”[54] He was accompanied by “Toma-Chi-Chi, Mico, and a Body of Indians, who, tho’ but few, being not forty, were all chosen Warriors and good Hunters.” They were conveyed in two Scout Boats, and the next day were joined by the periagua, commanded by Captain Hugh MacKay, with thirty Highlanders, ten men of the Independent Company, and entrenching tools and provisions on board. Upon the north-western point of Cumberland island[55] washed by the bay on the one side, and on the other by the channel running to the southward, Oglethorpe marked out a fort, called it St. Andrews, and left Captain MacKay with his command to build it, and some Indians to hunt and shoot for them while thus employed. Proceeding on his voyage, Mr. Oglethorpe named the next large Island to the South, Amelia,[56]—“it being a beautiful Island, and the Sea-shore cover’d with Myrtle, Peach-Trees, Orange-Trees, and Vines in the wild Woods.” Tomo-chi-chi conducted him to the mouth of the St. Johns, pointed out the advanced post occupied by the Spanish Guard, and indicated the dividing line. It was with difficulty that the old chief and his followers could be restrained from making a night attack upon the Spaniards, upon whom they thirsted to take revenge for the killing of some Indians during the Mico’s absence in England. Stopping at fort St. Andrews on his way back, Oglethorpe was surprised to find the work in such a state of “forwardness,—the Ditch being dug, and the Parapet raised with Wood and Earth on the Land-side, and the small Wood clear’d fifty yards round the Fort.” This seemed the more extraordinary, adds Francis Moore, because Mr. MacKay had no engineer, or any assistance other than the directions which Mr. Oglethorpe gave. The ground consisting of loose sand, it was a difficult matter to construct the parapets: “therefore they used the same Method to support it as Cæsar mentions in the Wars of _Gaul_, laying Trees and Earth alternately, the Trees preventing the Sand from falling, and the Sand the Wood from Fire.”