Where was the first telegraph used searching

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Keyword	CPC	PCC	Volume	Length string	Score
where was the first telegraph used	1.24	1	3289	34	45
when was telegraph first used	0.67	0.4	8549	29	83
when were telegraph poles first used	0.68	0.7	6331	36	52
when was the telegraph first used in war	1.79	0.9	3996	40	40
who made the the first telegraph	0.89	0.1	1945	32	33
when was the first telegraph sent	1.09	0.3	5334	33	64
how did the first telegraph work	1.42	0.2	1046	32	33
when were telegraph invented	1.92	0.4	1665	28	69
when was telegram first used	1.2	0.7	3803	28	25

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