The Heemskirk district was visited some weeks ago by one
of the authors in the course of his official duties as Assistant
Government Geologist. Most of the field observations then
made have already been published in the report on the
district recently issued by the Mines Department, but the
necessity of writing these reports as soon as possible after
the examination of the district in question is completed
precludes the possibility of a minute examination into the
microscopical character of the rocks prior to publication
