Only a short extract from "Ivan Tsarevitch" survived. The Tsarevitch initially misdiagnosed with simple rheumatism, deteriorated rapidly. At around 10&colon;15, "Kronprinz" opened fire on "Tsarevitch" and "Bayan", and scored hits on both. Earle's built two steam yachts for Tsarevitch Alexander&colon; "Slavanka" in 1873 and "Czarevna" in 1874. Unfortunately for the claim, the tsarevitch Alexei was a hemophiliac, and Heino Tammet was not.