FW's suggestion to collect William Herschel's published works into one volume was considered earlier, but publishers found it not profitable. All works except two are in R.S.P.T., 1780-1818. [Letter continues 22 Mar.:] JH almost completed identifying and assembling all of WH's double stars and micrometrical measures. Thanks for calling attention to 'unpublished series of 400 'Guages [sic] ('hausters')" noticed by [Maximilian Weisse]. JH was not aware of these. [Letter continues 23 Mar.:] Does not approve of FW's suggestion to request subscriptions to fund collection of WH's works. [Note by copyist: List of differences between original letter and copy.] [Unknown annotation: 'Original in No. 2 Corresp. Tin box B.8.']