McGonagall was not the only magical cat on Privet Drive
One day while pulling weeds in the garden, Harry sees a shadow fall onto him. Looking up, he saw the silhouette of a man with a very tall top hat looking at him.
"Hello," he said, jovial and curious much to Harry's surprise.
"Hello sir," Harry replied, anxious.
The man then knelt down to Harry's level and Harry caught a glimpse of something swishing behind him, something long, thin, and furry. Looking back to his face, Harry gasped when he realized the man was covered in black fur, had whiskers, white gloves, and a face with an uncanny resemblance to a cat.
"What are you doing here?" he asked.
"I'm doing the garden," Harry replied, backing away slightly.
"All by yourself?" the man asked, taken aback. "Where are your parents?"
"They're...they're dead sir," Harry answered.
"Oh, I'm sorry to hear that," the man said sadly. "But still for a child your age to be doing this."
"I have to sir," Harry insisted. "My aunt and uncle say I have to."
"Well if it must be done, we can help with that," the man declared, pulling off his top hat to reveal...a smaller identical version of himself who then pulled his hat off, revealing another one, which revealed another, and another, and another.