Found the following hamletworks.org entries referring to line 663+4
View Commentary Note for 663+1
663+1
{The very place puts toyes of desperation}
1.4.75
View Commentary Note for 663+4
663+4
{And heares it rore beneath.}
1.4.78
View Material Textual Note for 663+4
663+4
{And heares it rore beneath.}
1.4.78