In this notice, Walker mentioned that Prism customs refuses drawbacks unless the contents are opened for identification wire instructions.

This fond is related to prisms from Kodaikanal Observatory

The letter is to Walker referring to D.O. 5934 regarding dark glasses. The letter states that he has never seen the eye-piece box as the wedge was satisfactory.

This letter was written to the Director, regretting that they cannot undertake to open the box at their risk, and also they are forwarding the case without opening it and are unable to get a drawback of 7/8 of the duty under the circumstances.

This letter to Mr McDowell states Dr Pfund is now ruling gratings up to 4.5 in, and his diamond points do not last much longer than that. Hence, they are searching for others to rule out some big gratings from the beginning of next month. And this letter was copied to the Director General of Stores to do something needful about this problem, and they mentioned in their last reply letter due to some problem it was impossible to give delivery on time, but everything under their power was done, however, to furnish the grating and the first 6-inch plane ruled of first quality would be shipped.

The letter was written by Houghtons Ltd. to The Secretary of State for India in Council on the enquiry about the quality of the spectrograph slides being sent to Kodaikanal Observatory.

A letter from the Director to the Director General of Observatories stating that the cheaper of the two classes of wedges offered by Hilger is quite good enough for the purpose for which they were required

This letter was about shifting the Lallemand cell to Kodaikanal. He left a separate note to Dr.Sinvhal also in this matter. Dr.Bappu explained its origin and its journey from Paris to Nainital.

This letter is from K.D. Naegamvala to Dr G.T. Walker regarding lending two prisms to Kodaikanal, which was asked to be forwarded by passenger train where transit charges would also be considerable.

This letter from J. Evershed to the Director-General of Stores regarding the 30-degree prism ordered for Kodaikanal M6145 Hilger, which should not be sent out for trial as judged by Mr Shackleton, the prism does not meet the requirements of the specification and should be rejected.