What page does Frankenstein write back to Elizabeth?

My copy.... pg. 71;

Elizabeth Lavenza
Geneva, March 18th, 17—
‘Dear, dear Elizabeth!’

I exclaimed when I had read her letter. ‘I will write instantly and relieve them from the anxiety they must feel.’ I wrote, and this exertion greatly fatigued me; but my convalescence had commenced, and proceeded regularly. In another fortnight I was able to leave my chamber...