|Alternative reference number
|Copy letter from Michael Foster, to Dr Berry Haycraft, the University, Edinburgh
|20 August 1891
|'My dear Haycraft,
I thought it was arranged that in publishing your paper in Zt. für Biol. [Zeitschrift für Biologie] you were to acknowledge at least that the plate was taken from the Proc. Roy. Soc. ['Proceedings of the Royal Society']. I do not in the paper see anywhere any such acknowledgment. I have not compared carefully the paper in Zt. Biol. with that in Proc. Roy. Soc. but I suppose since there is no statement about it, that the one is not a mere reproduction of the other.
(signed) M Foster'.