Alexander Henry Haliday,
Letters from Alexander Henry Haliday to Hermann Loew 29 April 1869 and 186-
“ Your collection must embrace new rare materials - as are hardly to be found together elsewhere. The edifice of Meigen has been rebuilt to a considerable extent now piece by piece, but these are scattered here & there, and the need must be felt for a complete revision of the Diptera of Europe, to supplement, if not to supersede, his memorable labours. ”
