Found the following hamletworks.org entries referring to line 3657+8

View Commentary Note for 3657, etc.
3657+6 {Ham. I am constant to my purposes, they followe the Kings plea-}5.2.201
3657+7 {sure, if his fitnes speakes, mine is ready: now or whensoeuer, pro-} 
3657+8 {uided I be so able as now.} 

View Immaterial Textual Note for 3657, etc.
3657+6 {Ham. I am constant to my purposes, they followe the Kings plea-}5.2.201
3657+7 {sure, if his fitnes speakes, mine is ready: now or whensoeuer, pro-} 
3657+8 {uided I be so able as now.} 

View Material Textual Note for 3657, etc.
3657+6 {Ham. I am constant to my purposes, they followe the Kings plea-}5.2.201
3657+7 {sure, if his fitnes speakes, mine is ready: now or whensoeuer, pro-} 
3657+8 {uided I be so able as now.}