Black and white print of Hewlett Johnson studying what appears to be… Black and white print of Hewlett Johnson studying what appears to be one of the testubes pictured in CH5205. There is no caption but this picture appears to have been taken on the same day as CH5203, CH5204 and CH5205- in 1952.The woman who was displaying the germ warfare evidence? is also in the background. 1952 (circa)