a lawyer 引到的部分是George Eskridge 的同位语.乔治·埃斯克里奇,一个律师
in.后面是修饰a lawyer 的.
when she was orphaned(在华盛顿的母亲成孤儿时)
Washington’s mother had been left in a lawyer's charge (就是George Eskridge) 她被留给律师乔治.埃斯克里奇的监护下
因为lawyer 在前面,这里是说 in "his" charge ...所以变成 in "whose" charge 来修饰
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