As Stearn remarked "I came to know his numerous publications and to admire the industry, tenacity and ability with which he undertook successfully so many different things".
علق ستيرن قائلا: "تعرفت على منشوراته العديدة وأعجبت بتصنيعه والمثابرة والقدرة التي تعهد بها بنجاح لأشياء كثيرة مختلفة".