Just saw this Dave, sorry got your loss.  Cancer sucks! Prayers for your family 
Do not stand at my grave and weep
I am not there, I do not sleep
Im the diamond glints in the snow
I'm the sunlight of ripened grain 
I'm the gentle Autumns rain
When you awaken in the morning hush
I am the swift 
uplifting rush
of quiet birds circled in flight
I am the soft star that shines at night
Do not stand at my grave and cry
I am not there, 
I did not die