From Hermann Müller   12 February 1879

My dear Sir

I cannot pass this day in which you accomplish the 70^th year of your wonderfully rich life without sending to you my heartiest congratulation and the cordial wish that a long and serene evening of life may be destined to you.¹

It is very welcome to me that by your kind mediation my article has been dispatched to the Linnean Society²

Yours | very sincerely | Hermann Müller