Your search for "Letters entirely autograph by Bess" returned 16 letters.
Bess (Lady Cavendish) writes to Sir John Thynne after completing a long and troublesome journey home, with an account of her travel difficulties and the disordered state in which she found her 'poor house' (i.e. Chatsworth) upon arrival.
Bess (Lady Cavendish) writes to Sir John Thynne with news of 'disordered things' recently put 'into some good order', including relations with her tenants. She hopes Thynne can visit Chatsworth on his next trip to London or when visiting his estates in Yorkshire.
Bess (Lady Cavendish) writes to her servant Francis Whitfield concerning the management of Chatsworth, and asks him to look after everything until her aunt (Marcella Linacre) arrives. Among her instructions to Whitfield are that he is to take only wooden 'cleats or boards' not needed for the ongoing building works at Chatsworth; to brew beer, especifically for her and her husband William Cavendish; to repair her bedroom; and to pay her midwife. She also reprimands him for not supplying her sister Jane (née Hardwick) with 'things needful for her'.
Bess (widow of Sir William Cavendish) writes to Sir John Thynne regarding a bill against her and others currently in parliament, asking him to come to London speedily to help prevent its passing. Letter ID 211 is a copy of this.
Bess (widow of William Cavendish) writes to Sir John Thynne regarding a bill unfavourable to her in parliament, thanking him and hoping for his continued support in preventing its passing. Letter ID 212 is a copy of this.
Bess (Lady St. Loe) writes to her servant Francis Whitfield with instructions for the battlement at Chatsworth. A postscript asks him to 'tell Bess Knolles and Frank that I say if they play their virginals that they are good girls'.
Bess (countess of Shrewsbury) writes to Robert Dudley, earl of Leicester, complaining about the delayed delivery of his latest letters concerning the imminent arrival of Mary Queen of Scots at Tutbury Castle.
Bess (countess of Shrewsbury) writes to her husband, George, sixth earl of Shrewsbury, accusing him of forgetting 'your none [a pet name for herself]', as he has not sent the plumber she requested and the provision for beer and ale have been so poor of late. She mentions 'a letter of all the news I received', which she asks him to return once he has read it. Also enclosed are 'some lettuce and butter'.
Bess (countess of Shrewsbury) writes to her husband George, sixth earl of Shrewsbury, letting him know that the wine he sent is no good, suggesting they get someone else to buy it before it is undrinkable. She also discusses details regarding several servants of their household.
Bess (countess of Shrewsbury) writes to Robert Dudley, earl of Leicester, to thank him for favours shown to her and ask him to present a friend of hers to the queen. In the postscript she writes on behalf of her son Henry Cavendish, requesting that Dudley send 'earnest letters' to the Prince of Orange in Henry's favour.
Bess (countess of Shrewsbury) writes to her husband, George, sixth earl of Shrewsbury, thanking him for, and returning letters he has sent to her, saying 'they require no answer'. She asks after timber and iron, as well as money he promised her to buy oxen. The earl's son Gilbert (Talbot) has been troubled with his 'old disease' and the last batch of malt to come was 'very ill and stinking'. The lack of provision and drink makes her think he 'mind not to come'.
Bess (countess of Shrewsbury) writes to her husband, George, sixth earl of Shrewsbury, about an upcoming visit from her daughter Elizabeth (countess of Lennox), grand-daughter Arbella Stuart and daughter-in-law Grace Cavendish (née Talbot), which she would like to postpone due to danger of 'the infection'. She also writes of arranging a timber delivery for gates and other things, and asks for Shrewsbury's help in the matter.
Bess (countess of Shrewsbury) writes to Queen Elizabeth I, thanking her for the 'most especial and gracious goodness to grant unto my poor daughter [Elizabeth] Lennox the custody of her child [Arbella Stuart]'.
Bess (countess of Shrewsbury) writes to William Cecil, Lord Burghley, thanking him for his friendship and describing the accommodation arranged for her at court by Robert Dudley, earl of Leicester. In a postscript she notes that she has not yet moved any suit to the queen.
Bess (countess of Shrewsbury) writes to Sir Francis Walsingham, assuring him of her loyalty towards him and the queen. She reports that her husband, George, sixth earl of Shrewsbury, has pronounced articles sent to Mary Queen of Scots, who has grown 'lean and sickly'. Mary will write her own answer to the accusations, but Bess cautions that whatever Mary says 'in excuse of her self I hope there will be advised considerations in believing her'.
Bess (countess of Shrewsbury) writes to her husband, George, sixth earl of Shrewsbury, thanking him for a letter which has provided her with great comfort - she was afraid that having left so early in the morning as he did would have caused him pain in his hands and legs. She looks forward to their next meeting and (in a postscript) asks him to bear with her 'bleating' (i.e. prattling) as she has not written much of late under her own hand, and 'could not now forbear'. Although undated, this letter is almost certainly from the period in which Bess and Shrewsbury were at court in April 1587, being 'reconciled' by the queen. The queen's resulting commandments were favourable for Bess, but Shrewsbury remained bitter (which is perhaps why he left Chelsea without her).