Herr Eberhard

Herr Eberhard is the inventor of Eberhard’s formula, a closely guarded creation whose recovery resolves the immediate threat to his work. The formula is not merely valuable property: when it is found, he embraces it as the child of his own mind.

The invention and its secrecy

The formula had been tested in secret at Sir Oswald Coote’s works, where Herr Eberhard had gone with him. By the time the investigation reaches its decisive stages, the invention is understood to be a target of international interest. Sir Oswald says that foreign governments are seeking it and that it is worth millions, giving the secret trials a significance far beyond the inventor’s personal achievement.

The formula’s recovery

When Battle sees Loraine Wade clutching a brown-paper parcel, he takes it from her and indicates that it contains what George Lomax wants. Sir Stanley Digby acts before Lomax can: he snatches the package, tears it open, and eagerly examines what is inside. Herr Eberhard’s face has gone chalk-white; once the formula is recovered, he clasps it to his heart and speaks in a torrent of German. The change from anxious pallor to physical embrace makes his attachment unmistakable.

Character and narrative significance

Herr Eberhard’s brief appearances define him through his work and his response to its threatened loss. The formula has been handled as a secret, tested under restricted conditions, and pursued by people with competing interests; for its creator, its return is also intensely personal. His embrace gives the recovered document human weight, while the episode confirms that the object at the centre of the intrigue is indeed his invention.