Hanley collected over a period of 60 years , and corresponded frequently with many other naturalists of his time .
Hanley collected molluscs extensively ; most of his collections are today held at Leeds City Museum in Yorkshire , England .
Hanley collected over a period of 60 years , and corresponded frequently with many other naturalists of Hanley 's time .
Hanley collected molluscs extensively ; most of his collections are today held at Leeds City Museum in Yorkshire , England .