(1985), Present-Day English (PDE) has two reciprocal pronouns, one another and each other, and they are related to the reflexive pronouns in that they express a 'two-way reflexive relationship' (1985: 364-365).
The reciprocal pronouns, on the other hand, express mutual action or relation on the part of the persons indicated by the subject." This important difference can be seen for example in the two short sentences referring to Adam and Eve, quoted above in (1).
G6ran Kjellmer's article in ES in 1982 on the use of the English reciprocal pronouns each other and one another, extensively discusses, among other things, the acceptability of reciprocal clauses in different contexts.
On the whole, then, reciprocal pronouns occur only to a very limited extent as the head or modifier of the subject but more freely with other constituents, particularly with the predicative complement.
They also comment on the fact that the reciprocals are so infrequent, saying that the distribution must be connected with the lower frequency in conversation; if there are fewer plural referents, there will also be fewer reciprocal pronouns.
Both the CEEC and HC show growth in the general frequency of the reciprocal pronouns. According to Raumolin-Brunberg (1997: 231) of the three alternatives one another, (the) one the other and each other, one another is the most frequent until the last section of the HC (1640-1710), during which each other becomes slightly more common.
1997 "Reciprocal pronouns: From discontinuity to unity", Studia Anglica Posnaniensia XXXI: 227-236.
Reciprocal pronouns from Middle English to Early Modern English
Among the varied structures described above, the following three phrases began to develop characteristics typical of Present-day English reciprocal pronouns: one another, (the) one the other and each other.
Both the CEEC and HC show growth in the general frequency of the reciprocal pronouns. This is obviously due to the increasing use of the three items selected for the examination.
Reciprocal pronouns may also belong to this set of changes.
Table 1 The reciprocal pronouns in the Corpus of Early English Correspondence and The Helsinki Corpus of English Texts CEEC HC 1560- 1620- 1500- 1570- 1640- 1619 1681 1570 1640 1710 One another Object/Genitive 6 29 1 6 4 Prep.