Letters from unidentified author "SCV" to Blanche Cavendish (née Howard) Countess of Burlington

In these letters the author writes concerning Lady Barrington's ill mental state following the sudden death of one of her children and her concern for her considering she is in the early stages of pregnancy which has caused her danger in the past. She also writes in another letter of the pleasure she and George have in hearing that something went well for William [Lady Blanche's husband].