Betty to the rescue (1917)

Henry Sherwin is led to believe by mine expert James Fleming that the mine he invested all his money in is valueless, though Fleming has discovered a rich vein of gold that he keeps secret. When Sherwin dies shortly thereafter, he leaves his daughter Betty in the care of John Kenwood and his sister, Constance, who allows Betty to believe she has an income, sending her to boarding school while they surreptitiously go to work to support her. Upon her return home Fleming pursues her but she rejects him, and he tells her the mine is worthless. However, a dream leads her to believe otherwise and after much travail she discovers the truth as well as Fleming’s duplicity. John declares his long-hidden love for her, and they are wed.