The record-breaking West End run of The Mousetrap still testifies to her skill as a dramatist.
The entire set piece becomes a meditation on theater's role in snapping bonds, and that so many levels of thought can be conveyed in so few words testifies to great skill in both the actress and the director.
And he has promoted a range of work with pioneering international companies, such as the sublimely offbeat Quarantine, which testifies to his skills as a producer.
The success of a small non-Christian people in carving out and maintaining an extensive empire testifies to the political skill of its ruling princely caste as well as to the policy of wide autonomy and religious toleration.
Translations of lives of the saints and apostles and accounts of the Holy Virgin testify to the skill of Icelandic prose writers in handling the vernacular for narrative purposes from the 12th century onward.
Just last year, he was selected to referee two of the most important matches on Earth: the finals of the Champions League, in May, and then the European Championship, two months later — plum gigs that testified to his skill.
The Pharos (lighthouse) of Alexandria, Solomon's Temple in Jerusalem, the Colosseum in Rome, the Persian and Roman road systems, the Pont du Gard aqueduct in France, and many other large structures, some of which endure to this day, testify to their skill, imagination, and daring.
There are also 23 research-and-development centres in town, testifying to the skills of the local workforce and of the recent arrivals.
Such awards testified to his skills as a writer but all who knew him also testify to the kind of man he was: acutely intelligent and very knowledgeable but also witty, kind and warm.
The videos' diversity testifies to Björk's sensibility and collaborative skills, her ability to get the best from very different directors.
That such a policy succeeded without fatal strife to the union testifies to her strong political position as well as to her diplomatic skills and her ruthlessness.
