1From Thomas Jefferson to C. P. de Lasteyrie, 28 March 1807 (Jefferson Papers)
I return you my thanks for your two volumes on the subject of the Merino breed of sheep, which have come safely to hand. no one sets higher value than I do, on whatever tends to promote those pursuits which belong to Agricultural life, and among these, the improvement of the race of sheep is of principal importance; for the information you have given on this subject we are all indebted to you....
2From Thomas Jefferson to C. P. de Lasteyrie, 15 July 1808 (Jefferson Papers)
I have duly recieved your favor of Mar. 28. and with it your treatises on the culture of the Sugar cane & Cotton plant in France. the introduction of new cultures, & especially of objects of leading importance to our comfort, is certainly worthy the attention of every government, & nothing short of the actual experiment should discourage an essay of which any hope can be entertained. till that...