...As I scanned the acres ofrough moor and then looked at the sea lapping delicately on the grey sand I hadthe feeling that a knotty problem was before me... 
John Buchan 「Mr. Standfast」
...There were about six hundred men seated respectfully on the ground around me, while I sat with my back to the huge knotty trunk, with Ibrahim and Richarn at a few paces distant...
Samuel White Baker 「In the Heart of Africa」
...It is best, however, not to listen to anysuch complaints, and somehow the disputants settle the knotty pointthemselves...
Joshua A. Nunn 「Notes on Stable Management in India and the Colonies」
...It displays wrinkles and seams, due to the differentcourses of mortar, or else knotty protuberances distributed almostconcentrically...
J. H. Fabre 「The Wonders of Instinct」
...'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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