[51.] "N." is most likely a misprint for "E.", as magnetic variation of the compass can only be East or West.
[52.] "McCleod" is a possible misprint for "McLeod", as it appears earlier in the text.
[53.] Original had "or"; corrected to "of".
[54.] "Thlouee-tessy" is probably the same as "Thloueea-tessy" above.
[55.] Original had "today"; changed to "to-day" to be consistent with other occurrences in the text.
[56.] Original had "varition"; changed to "variation".
[57.] Original had "Copper-Mine-River"; changed to "Copper-Mine River".
[58.] "S." in the latitude reading is very unlikely; almost certainly a misprint for "N."