 Hornung kept abreast of scientific and medical developments , and was keen to incorporate them into his stories which , the critic for Contemporary Authors states , shows Hornung had " a streak of modernity and decided interest in new ideas " . The Camera Fiend uses the modern technology of the camera as an instrument central to the plot , while the protagonist of The Crime Doctor uses psychology to identify criminals . 
 Hornung kept abreast of scientific and medical developments , and was keen to incorporate them into his stories which , the critic for Contemporary Authors states , <a href='uninflect' title='1'><mark>shows</mark></a> Hornung had " a streak of modernity and decided interest in new ideas " . The Camera Fiend <a href='uninflect' title='2'><mark>uses</mark></a> the modern technology of the camera as an instrument central to the plot , while the protagonist of The Crime Doctor <a href='uninflect' title='3'><mark>uses</mark></a> psychology to identify criminals . 
Hornung kept abreast of scientific and medical developments , and was keen to incorporate em into his stories which , da critic for Contemporary Authors states , show Hornung had " a streak of modernity and decided interest in new ideas " . TdaCamera Fiend use thdaodern technology of thedamera as an instrument central to the plot , while the protagonist of The Crime Doctor use psychology to identify criminals .