The cause of his wrath was this; a lead mine had been discovered upon the farm of Mill Grove, and Audubon had applied to his father for counsel in regard to it. In response, the elder Audubon had sent over a man by the name of Da Costa who was to act as his son's partner and partial guardian—was to teach him mineralogy and mining engineering, and to look after his finances generally. But the man, Audubon says, knew nothing of the subjects he was supposed to teach, and was, besides, "a covetous wretch, who did all he could to ruin my father, and, indeed, swindled both of us to a large amount." Da Costa pushed his authority so far as to object to Audubon's proposed union with Lucy Bakewell, as being a marriage beneath him, and finally plotted to get the young man off to India. These things very naturally kindled Audubon's quick temper, and he demanded of his tutor and guardian money enough to take him to France
