This is based on the original and unrevised 1926 edition of CLOUDS OF WITNESS first published in the United States by Harcourt (copyright unrenewed) and then in the UK by Unwin. Since this book was first published in the US and not later renewed in the 28th year, the expired copyright is not eligible for GATT restoration. However, what became known as the standard edition was revised and published in 1935 by UK publishers and remains in copyright under the limitation of claim; new matter (revisions and additions). The fiancé of Lord Peter's sister, Mary, is found dead outside the conservatory of the family's shooting lodge in Yorkshire. Peter's and Mary's older brother, the Duke of Denver, is charged with wilful murder and put on trial in the House of Lords. How can detective Lord Peter proceed when it's a murder in his own family potentially by his own brother?