no, a capitalized second letter is not logical.

Capitalizing a non-first letter is not used in German language.
Except in abbreviations like GmbH (Gesellschaft mit beschränkter Haftung) as the abbreviation uses the capitalization of the single words) or
if the whole word is capitalized (in headlines, or to emphasize a word)

I have seen quite a lot of old German books (including bibles and church hymn books and religious texts), and never saw Herr written as HErr. This strange capitalization is so unusal it is irritating when reading a text ...

I just looked at ~20 old hymn books (which my father collected) dating from ~1600 to ~1900 and did not see a HErr ...

As the book is from Wisconsin, maybe HE was capitalized in Herr as "HE, the Lord" (but even that does not make much sense to me ...)

Andy a/k/a MudGuard, native German speaker