A review by vesper1931
The Albert Gate Mystery Being Further Adventures of Reginald Brett, Barrister Detective by Louis Tracy

4.0

In a heavily guarded house four murders occur and the diamonds held there disappeared. Assistant Under-Secretary at the Foreign Office, Jack Talbot and man put in charge of proceedings has disappeared. The Earl of Fairholme, fiance to Miss Edith Talbot seeks the help of Reginald Brett, barrister and detective.
An entertaining mystery and thriller
Originally published in 1904