A Matter Of Deduction - The Ink Stained Envelope Solution

The Ink-Stained Invitation- Solution

"Watson, look at that envelope—what do you make of it?"At the doorstep of a grand townhouse, Holmes pointed to a dropped wedding invitation, slightly smudged.
“The sender must have been in a hurry,” I noted. “The ink hasn’t fully dried before it was handled.”
Holmes nodded. “And yet it tells us more than haste.”
Clue: The address is written in elegant, sweeping cursive, but only the bottom left corner of the envelope is smudged.
Can you deduce what Holmes has already guessed about the sender?

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Solution: The ink on the bottom left is smudged, not the writing itself. This suggests the person is left-handed—they held the envelope in their writing hand while writing with the right (or vice versa), causing the smudge.But the style is typical of right-handed writers. Therefore, someone else wrote the envelope, possibly to disguise the sender's identity.