added that this differentiation of the pronouns is not found in
any printed poem of Milton's before Paradise Lost, nor is it
found in the Cambridge autograph. In that manuscript the
constant forms are me, wee, yee. There is one place where
there is a difference in the spelling of she, and it is just possible
that this may not be due to accident. In the first verse of the
song in Arcades, the MS. reads:

This, this is shee;

and in the third verse:

This, this is she alone.

This use of the double vowel is found a few times in Paradise
Regain'd: in ii. 259 and iv. 486, 497 where mee begins a line,
and in iv. 638 where hee is specially emphatic in the concluding
lines of the poem. In Samson Agonistes it is more frequent
(e.g. lines 124, 178, 193, 220, 252, 290, 1125). Another word
the spelling of which in Paradise Lost will be observed to vary is
the pronoun their, which is spelt sometimes thir. The spelling in
the Cambridge manuscript is uniformly thire, except once when
it is thir; and where their once occurs in the writing of an
amanuensis the e is struck through. That the difference is not
merely a printer's device to accommodate his line may be seen
by a comparison of lines 358 and 363 in the First Book, where
the shorter word comes in the shorter line. It is probable that
the lighter form of the word was intended to be used when it
was quite unemphatic. Contrast, for example, in Book iii. l.59:
His own works and their works at once to view with line 113: