It is said that when the Fletchers owned Achallader, Sir Duncan Campbell - known as Black Duncan - ordered an English servant (or soldier) to pasture his horse in the Fletchers’ corn. When warned off by the Fletchers - in Gaelic - he did not understand; when he did not remove his horse they shot him. Black Duncan, affecting concern that the Fletcher laird would be hanged for the killing, advised him to flee to France. Before he fled he passed the property to Black Duncan, supposedly until his return, to prevent it being forfeited to the Crown. The Fletchers never recovered the property. The MacGregors burnt the castle in 1603.