Not really sure, but it looks to me as though you might have passed the "normal" route up to iceberg lake. I think if you had just climbed up 30' or 40' you would be there.
You may be right, John. When I look at this picture I was looking ahead at that big flat spot of scree in the lower left hand corner, thinking that's where I would be turning up to the lake.
However, when I look at this picture I think I see that same flat field of scree at the base of Mt Whitney and it seems quite a long way past the ascent to Iceberg Lake according to the red line path.
How could I have passed the seep(s) and missed the place to turn up to the lake? I was advised that I would clearly see many footprints in the sand going up there.