The Adventures of Tintin partially deaf physicist and a regular character alongside Tintin, Snowy, and Captain Haddock. He was introduced in "Red Rackham's Treasure", and based partially on Auguste Piccard, a Swiss physicist. The leading characters do not initially welcome his presence, but through his generous nature and his scientific ability, he develops a lasting bond with them. Eventually, by the end of "Land of Black Gold", he becomes a resident of Marlinspike Hall. Normally mild-mannered and dignified, Calculus occasionally loses his temper and acts in a spectacularly aggressive manner in response to actual or perceived insults, such as when Captain Haddock belittles his
Tintin and the Blue Oranges revive and find themselves in a grain silo but are rescued by Snowy dropping a rope into it. Back in town, they find themselves pursued by the police, who chase them all around a market. Tintin and Haddock escape thanks to Bianca Castafiore. After an unexpected visit by a delegation from the visiting Emir of Sakali, Tintin and Haddock meet up again with their young friends. They decide to sneak back into Prof. Zalamea's hacienda to test some new information; that is, the collusion of Esposito (Zalamea's manservant) in the kidnapping. After successfully using animals with pans tied to their