John Marshall Gamble, Wildflowers Along the Coast, oil, 16 x 24. Estimate: $40,000-$60,000. ← Previous Next → John Marshall Gamble, Wildflowers Along the Coast, oil, 16 x 24. Estimate: $40,000-$60,000. John Marshall Gamble, Wildflowers Along the Coast, oil, 16 x 24. Estimate: $40,000-$60,000.