Royal Observatory Greenwich | London S.E. | 1857 May 4
My dear Sir
In thanking you for your note of Saturday,1 I regret to say that I cannot take advantage of your freedom on Tuesday, for I am engaged to be in Suffolk2 on that morning.
But if Thursday or Friday should be available, or any day of next week after Monday, I would gladly profit by your kindness. Yours my dear Sir
Very truly | GB Airy
Professor Tyndall
RGO MS.RGO 6/471.169
Please cite as “Tyndall1388,” in Ɛpsilon: The John Tyndall Collection accessed on