A pleasant, if unremarkable, read. This is a fairly standard family story of its time. The parents are absent, on a trip for the mother's health. Celia, the eldest daughter, gets about a day in charge of the housekeeping before she falls down the cellar stairs and breaks her leg, leaving 18-year-old Charlotte (the eponymous "second violin", so-called from her part in the family string quintet) in charge. Charlotte learns to cook, housekeep, and baby-mind, and falls in love with the doctor next door. In the second half of the book, Charlotte, now married, acts as guardian and mentor to a handful of waifs and strays, and romance for two of her siblings follows.
The characters, it must be admitted, are somewhat on the cardboard side, the plot is slight, the storytelling somewhat disjointed. But for all that, it held my attention enough to while away an afternoon.