When my son was little, I did a lot of walking. Pushing him in a stroller, killing time, keeping him busy. Keeping myself busy. I soon got sick of my neighbourhood, so I ranged further afield, until my wandering took me to Melbourne General Cemetery. A perfect place to stroll, I thought, while checking out a bit of history. But in the end, I cut my visit short, racing out with tears in my eyes. Because as I walked, I kept noticing the graves of babies and children. And, as a new parent, that…