The OFFICE OF THE SURVEYOR GENERAL (Government of Ontario, Ministry of Natural Resources and Forestry) website has links to:
a) Request form to obtain copies of Crown Survey Plans, Field Notes and the Original Survey Instructions,
b) Instructions for Crown Land Surveys and Plans in Ontario, November 2017,
c) Instructions for Crown Land Surveys and Plans in Ontario, Nov 1, 2010
d) COSINE coordinate database,
e) Procedural Guide for Survey of Mining Claims.
A link to this website may be found here.
The MINISTRY OF NATURAL RESOURCES and FORESTRY has a number of published policies regarding the acquisition and sale of crown land that may be of interest to land surveyors that may be found here.