“You probably don’t remember me,” he was telling Wolfe. “I was at your house one day with Raymond Plehn—”

“I remember. Certainly, Mr. Dill.”

“I just saw Plehn downstairs and he told me you were here. I was going to phone you this afternoon. I wonder if you’d do something for me?”

“That depends—”

“I’ll explain. Let’s step aside away from this jostling.” They moved, and I followed suit. “Do you know anything about the Kurume yellows?”

“I’ve heard of them.” Wolfe was frowning but trying to be courteous. “I’ve read of them in horticultural journals. A disease fatal to broad-leaved evergreens, thought to be fungus. First found two years ago on some Kurume azaleas imported from Japan by Lewis Hewitt. You had some later, I believe, and so did Watson in Massachusetts. Then Updegraff lost his entire plantation, several acres, of what he called rhodaleas.”

“You do know about them.”

“I remember what I read.”

“Did you see my exhibit downstairs?”

“I glanced at it as I passed.” Wolfe grimaced. “The crowd. I came to see these hybrids. That’s a fine group of Cypripedium pubescens you have. Very fine. The Fissipes—”