He eventually received parts of 50 specimens of Hesperornis, which allowed him to make a much stronger demonstration of an evolutionary link between reptiles and birds than had been possible before.
Na kraju je imao dijelove 50 primjeraka Hesperornisa, što mu je omogućilo da napravi mnogo snažniju demonstraciju evolutivne veze između gmazova i ptica nego što je to prije bilo moguće.