Meanings of pure hashish in English

The present book's suggestion-Alamoutblack, an almost pure hashish with a few pinches of belladonna and stramonium-isbased on:

Ever since Marco Polo recorded the story of the Garden of Delights, Western commentators have identified Hassan's "magick chemical" as pure hashish.

"Someone visited your chambers last night," he said slowly, "and for your chloral tabloids substituted some containing hashish, or perhaps not pure hashish.