Why is there a verse missing from Grandmother Knitting in Songs Of Ourselves Volume 2?

We are aware that there is a discrepancy between the poem as it appears in Songs Of Ourselves Volume 2, and as it is widely anthologised.

As we have specified in the syllabus that Songs Of Ourselves Volume 2 is the prescribed text for examination, when set Grandmother Knitting will appear in assessment materials in the form in which it does in this anthology.

However we will also make sure that all examiners are made aware of the omission, so that no candidate is penalised for writing about the final stanza of the poem as it commonly appears elsewhere.