Bell lived in Sanders's home for a considerable period, dividing his time between teaching his little pupil how to talk and puttering away at a proposed invention which he called a " harmonic telegraph" .

贝尔在桑德斯家里住了相当长的一段时间，他把时间分配在教他的小学生如何说话和搁置一项他称之为“谐波电报”的拟议发明上。