The boy was then just turned fifteen, and seems to have rebelled from the humdrum life of the plantation. He was at the restless age, and his naturally adventurous disposition sought a more active outlet. This proved to be surveying--a profession then greatly in demand. There were great tracts of wilderness in Virginia still inhabited by Indians and infested by wild animals, which had never heard the sound of the woodman's axe. These tracts had been included in grants from the King, but their boundaries had never been exactly determined. To make such surveys was a task requiring both skill and courage. Washington was naturally an exact and painstaking boy. He now applied himself to geometry and trigonometry; and at the ripe age of sixteen was ready to sling his somewhat crude surveyor's instruments across his shoulder and subdue the wilderness. It promised excitement and adventure--and the work was well paid. Washington was even then a strapping big fellow, tall and muscular, and nearly six feet in height. He afterwards exceeded this height, but at sixteen there were naturally some hollows which remained to be filled out. He is described as having a well-shaped, active figure, symmetrical except for the unusual length of his arms, indicating great strength. His light brown hair was drawn back from a broad forehead, and grayish-blue eyes looked happily and perhaps soberly on the pleasant Virginia hills and valleys. His face was open and manly, set off by a square, massive jaw, and a general expression of calmness and strength. "Fair and florid, big and strong, he was, take him for all in all, as fine a specimen of his race as could be found in the English colonies." It was at this turning point in his career that Washington was fortunate in finding a friend and protector in Lord Fairfax, whose daughter was the wife of Lawrence Washington. This distinguished old veteran, a long-time friend of the Washington family, took a particular fancy to the young man. They hunted the fox together, and hunted him hard. In those days fox-hunting was no kid glove and pink tea affair. It was one of many perilous outdoor sports that frontier Virginia could afford; and as they hunted, the old English nobleman had opportunity to learn what sort of stuff this young Virginian was made of. He saw that here was a union of sturdy qualities upon which he could rely. Lord Fairfax then owned, by kingly grant, a vast estate stretching across the Blue Ridge into the untrodden wilderness. Until the estate was properly surveyed, it would be subject to endless lawsuits. We can imagine the following conversation on one of their helter-skelter rides together: "What are you studying now, George?" "Mathematics, sir." "Humph! Like it?" "In part--but some of it is stiff." "What are you going to do with it?"