Here and below, "invisible" means that the letter or punctuation mark is
not present, but there is an appropriately sized blank space.
A considerable pause ensued. [s in "ensued" invisible]
the thousand various birds [final s invisible]
Here all was solemn and silent [s in "was" invisible]
Its appearance was tall and robust, wrapped in a tattered white robe
[a in "and", r in "robe" invisible]
By the fate of war, he replied [r in "war" invisible]
he was worn to a skeleton
[spacing in this line is ambiguous; the word "a" may be either
missing or invisible]
I find by your father's letters that [final t invisible]
they projected scenes of connubial bliss [t in "they" invisible]
reflected in the glassy lake [l in "lake" invisible]