In 1936, at age 13, he published Small Craterlets
in the Mare Crisium, his first scientific paper on the Moon.
Other documented phenomena included surface faulting, avalanches, fissures, spouting from sand craterlets
, and slight damage to buildings.
What did astound the team were splashes of white seen in and around a handful of these craterlets
Barker's Quadrangle', after Robert Barker, is a trapezium-shaped arrangement of tiny craterlets
and ridges on the southern floor of the Mare Crisium.