TRAVANCORE UNUSUAL CANCELLATION... from the (late) Mr. John Trowbridge ex-collection 

Missing Town number.

Only one number is seen.

Mystery cancel on Laid paper.

'M' Preventive mark cancel.

Rubber stamp marking designed to prevent the illegal washing and reuse of postage stamps.

Interesting 'T' (T-8..Town is Mahanadapuram) marking on Cochin One Puttan stamp.

'FO' of FOUR missing 
'E' of ANCHEL.. Red blob on 'E'.
Watermark inverted.

Interesting & unusual 9 Bar cancel

Pen Cancelled stamps of Travancore