Add spaces: Ahundredyearslater,in1899,another,Mr.HoustonStewartChamberlain,lookedbackonwhatHerderhadwrittenandrecordedthefurther,continuingusurpationofpower:

Answer: A hundred years later, in 1899, another, Mr. Houston Stewart Chamberlain, looked back on what Herder had written and recorded the further, continuing usurpation of power:

Add spaces: Theyhadbeengiventhepromiseofthepromisedland,alandflowingwithmilkandhoney.

Answer: They had been given the promise of the promised land, a land flowing with milk and honey.

Add spaces: Conservingwaterisaanothersignificantenvironmentalbenefitofxeriscaping.

Answer:
Conserving water is a another significant environmental benefit of xeriscaping.