Meeting an old Enemy

Training for Dublin has been a bit hit and miss.
Last weeks tempo on Tuesday was very tough, 9 miles at 6:35 was very hard work.
Wednesday I did something I have only ever done once before, I got up early before work and ran. It was really nice, a beautiful morning as many have been recently, 10 easy miles.
Thursday some speedwork, 3 miles warmup, and 5x1 mile at 6 min miles, 60 second recovery, 2 miles cooldown, it was a good session.
Friday an easy 10 at 7:25.
Saturday was supposed to be 18 miles, but I had hoped to do 22.
I did the first 15 at 7:30 and then decided to up the pace for negative splits.
Mile 16 at 7:10, 17 at 7:06, 18 at 7:10, 19 at 7:14. And then we met, the old enemy who calls himself the wall! He arrived quickly, hitting me hard. I suppose I shouldn't have been surprised. I went out for my run at 12, having had breakfast at 9, so at 2:30 I was literally running on empty.
I struggled home miserably for 20:03 miles, the last mile at 8:10, with memories of my early marathon days, walking the last four miles.
There wasn't much soreness after the run, and Sunday was an easy 7 miles.
Monday and Tuesday rest due commitments.
Wednesday, out before work again, another beautiful, if not a little chilly morning. A mile warmup, and a planned 9 miles at 6:40. The first few miles went very easily at 6:30, the fresh legs after two days rest obvious. I fully expected to slow at four miles, but the pace was comfortable up to 7, and I pushed the last two a bit, to finish with a solid 6:30 pace for the 9, a mile cooldown.
Today was an easy 7 on grass, with the marathon so close, I am worried about injuries.
Gary doesn't really do conventional tapers, with a full schedule of runs this weekend, the long one being 14, a speed session thrown in for good measure.
Meeting the wall worried me, I don't think I have the training done that I had for London.
Time will tell, marathon day always amazes me.