Andrew Johnson actually said...

"I accordingly desire you to call General Grant's attention to the subject, leaving to his own discretion and judgment the measures of preparation and precaution that should be adopted"

"I feel great solicitude that should an insurrection take place the Government should be prepared to meet and promptly put it down"

"I therefore request that you will at once take such measures as will insure its safety, and thus discourage any attempt for its possession by insurgent or other illegal combinations."

"The Lieutenant-General will proceed to the execution of his duties without delay."