Preferably there should be something in or about the first sentence after the switch that communicates to the reader which POV you're now in. |
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Yes, I'd absolutely agree: you have to make it very clear, either by naming the sections, or by having very different voices.
In TMOL two first-person narrators alternate within chapters - a variable pattern of how many and who came first. I decided not to name the sections. It helped that they were 150 years apart, with voices to match, but I had a rule that the first sentence had to have two things in it which would orient the reader quickly and - hopefully intuitively. Usually that meant a
particularly characteristic shape and style of sentence, plus a name of place or person. My editor decided to put a squiggle when it changed, just to wake readers up, as it were, which I think was the right decision.
But in ASA, where two narrators are brother and sister, I didn't have a difference of period to help me, plus the confused reader had three different narrators to track, so those sections I did name - and in fact it was rather useful, since the three narratives also had very different time-frames (one a life, one a week, one a day), so I labelled the sections with the time (one years, one days, one hours), which clarified and pointed up the counterpoint of the different narratives.
The alternative would be to go for a third person narrative, and then you don't even have to plump for one POV or another, as long as you do the slides between the two properly. It's much more flexible. But it sounds as if you've got everything worked out for an alternating first-person, so I'd say go for it.
Emma