...Clapperton replied that he was a Protestant, but had to acknowledge that he was not sufficiently versed in religious subtleties to solve all the knotty points on which Bello wished for information... 
W.H.G. Kingston 「Great African Travellers」
... Poor Aaron's face and head, however, was left in a pitiable condition after such a pummeling with a knotty stick...
Austin Steward 「Twenty-Two Years a Slave, and Forty Years a Freeman」
...Also in washing, be careful not to move the hands in circles, or thehair will become entangled and knotty, and very difficult to untwist orunravel...
Harrison Weir 「Our Cats and All About Them」
...'In order to settle this knotty point, just hand the felon up here amoment,' said the Judge...
Norman Lindsay 「The Magic Pudding」
...Here, however, this variety presented the same knotty head,where other grasses grew luxuriantly...
Thomas Mitchell 「Journal of an Expedition into the Interior of Tropical Australia」
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